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My Mineral Collection, Miscellaneous Systematic Sulfates Page

These are my sulfates. There aren't very many common sulfate minerals so this page'll have mostly gypsum (selenite), celestite, and barite. As with the phosphates, there are often many (fairly rare) secondary sulfates (especially iron) on a given specimen.
Sulfates on Other Pages
See another ettringite on my borates page.

Morenosite's on my carbonates page.

Antlerite, boothite, brochantite, chalcanthite, chalcoalumite, connellite, cyanotrichite, devilline, langite, posnjakite, spangolite, tlapallite, and woodwardite are on my copper minerals page.

Caledonite, linarite, and osarizawaite are on my lead minerals page.

Glaucocerinite is on my zinc minerals page.

Sulfates Info
Closely related to the sulfates group are the sulfites, selenates, selenites, tellurates, and tellurites. In my opinion they should be here (because of a stronger chemical similarity), not with the oxides as Dana and Strunz would have it. A lot of tellurites, though, are mixed oxides. This class often includes the chromates, molybdates, and tungstates, which have their own page in my collection.
Specimens on This Page
(links take you to either the first or only specimen)

42 Rows

Alcaparrosaite

A very new mineral! An excellent miniature of tiny yellow sprays of monoclinic alcaparrosaite (a hydrated iron titanium potassium oxysulfate, K3Ti4+Fe3+(SO4)4O·(H2O)2) on a lavendar coquimbite matrix from the type locality of the Alcaparrosa Mine, Cerritos Bayos, Calama, El Loa Province, Antofagasta Region, Chile. This is so new (IMA 2011-024) that neither MinDat nor Webmineral has a page on it. It's the first titanium sulfate mineral and according to Gunnar Farber (who discovered it in 2008), it's hydrophobic and light enough that it floats on water.

Thanks to Tony Nikischer at the Excalibur Mineral Company for the specimen!

Aluminite

Newhaven, East Sussex, England is the home of this cauliflower head of aluminite (hydrated aluminum hydroxysulfate). Under longwave UV it fluoresces bluish-white on one side and yellowish-white on the other!

Thanks to SoCal Nevada's auction on eBay for the specimen and images!

Aluminocopiapite

An excellent micro of yellow-brown drusy aluminocopiapite (a hydrated iron aluminum hydroxysulfate) on matrix from the Alcaparrosa Mine, Cerritos Bayos, Calama, El Loa Province, Antofagasta Region, Chile. It's related to ferricopiapite, where ferric iron replaces the aluminum.

Thanks to Gabor Koller's auction on eBay for the specimen and the image!

Row 2

Alunite

This beautiful vein of alunite (a potassium aluminum hydroxysulfate) comes from an unknown location (probably Arizona). Alunite is mined as a source of alum, but specimens like this are often slabbed, polished, and sold as "Angel Wing Turquoise".

Thanks to Charley William's AZPERIDOT auction on eBay for the specimen!

Anhydrite

A big (16 cm) anhydrite (calcium sulfate) fan (jewelers call this light periwinkle color "angelite") from the recent find in the silver mines of Naica, Chihuahua, Mexico. The back side has some micro chalcopyrites strewn about.

Thanks to Cathy Krismanits' (Southwestern Sales) auction on eBay for the specimen!

Anhydrite

A beautiful (especially when backlit, larger image, right) cleavage fragment of purple anhydrite from the Faraday Uranium Mine (now the Madawaska Mine), Bancroft, Hastings County, Ontario, Canada. As with smoky quartz, the color is due to natural irradiation.

Thanks to Bill Awald's auction on eBay for the specimen!

Row 3

Anhydrite

This miniature of anhydrite is freestanding - it's also from Naica.

Arcanite

A little plastic container of brown arcanite (potassium sulfate) spherules from the Dingo Donga Cave, Madura Motel, Eucla, Western Australia, Australia. Arcanite was known artificially long before it found in nature.

Thanks to Paolo Bracci's auction on eBay for the specimen and the image!

Argentojarosite

A large thumbnail of pure argentojarosite (anhydrous silver ferric hydroxysulfate) from the type locality of the Tintic Standard Mine, Tintic, Utah County, Utah.

Row 4

Barite

This is a barite "desert rose" from the classic locality of Norman, Cleveland County, Oklahoma and it's about three inches in diameter.

Thanks to Great South Gems & Minerals for the specimen and the image!

Barite

Beautiful blue pointed blades of barite up to 3 cm coat this entire specimen from Cavnic, Maramures County, Romania.

Thanks to Chris Korpi at Pangaea Minerals for the specimen!

Barite

A very nice floater of pure white barite from the Hecla Rosebud Mine, Pershing County, Nevada.

Thanks to RAM Minerals for the specimen and the image!

Row 5

Barite

A single crystal of deep yellow barite from Elk City, South Dakota.

Thanks to Roger Hoek at ARCH Mineralsfor the specimen and the image!

Barite

A smaller cluster of smaller pure white barite from the Hecla Rosebud Mine, Pershing County, Nevada.

Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen!

Barite

Colorless transparent barite on matrix from the Shangulowe Mine (Shangulubwe), Democratic Republic of the Congo (Ex-Zaïre), Katanga, Africa.

Thanks to Gary Lozonne at Lozonne's Minerals for the specimen!

Row 6

Barite with
Stibnite

Yellow transparent barite with stibnite, some as inclusions, from the Post Pit, Carlin Trend, Eureka County, Nevada.

Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen!

Barite with
Periclase

Colorless barite with black iron-rich periclase (magnesium oxide) inclusions in this odd specimen from Cartersville, Bartow County, Georgia.

Thanks to Brett Shafer at The Mineral Vug for the specimen and the image!

Barite

A very nice cluster of honey barites from the famous Rock Candy Mine, Grand Forks, British Columbia, Canada.

Thanks to Marty Lewadny at CrystalEnthusia (formerly Crystal Variations) for the specimen and the image!

Row 7

Barite

Translucent tan barite coxcombs from the Palos Verde Peninsula, Los Angeles County, California.

Thanks to Emilie & Ron Kendig's auction on eBay for the specimen!

Barite

Tiny sprays of microscopic yellow barite needles from Butte County, South Dakota - the back is coated with them as well.

Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen!

Barite

Transparent yellow barite thumbnail from the famous Meikle Mine, Elko County, Nevada.

Thanks to Rory Howell's auction on eBay for the specimen and the image!

Row 8

Barite

Golden barite on matrix from the (20-year closed) Gilman Mine in Eagle County, Colorado.

Thanks to Rory Howell's auction on eBay for the specimen!

Barite

Beautiful colorless (they look tan because the matrix shows through) barite rosettes comprise this specimen from the sea cliffs of Palos Verdes, Los Angeles County, California.

Thanks to Rick & Deana Seng's auction on eBay for the specimen and the images!

Barite

More blue barite - this one's probably from the Hartsel, Park County, Colorado area.

Thanks to Cindy Monnich's auction on eBay for the specimen!

Row 9

Barite

A beautiful, gemmy, colorless barite crystal from the Book Cliffs area, Grand Junction, Mesa County, Colorado.

Thanks to C. Carter Rich's table at the Carnegie Gem & Mineral Show for the specimen!

Barite

Light green barite from Shaba, Zaire.

Thanks to Dan Wienrich at Dan & Jill Weinrich for the specimen and the image!

Barite

A beautiful golden gemmy barite crystal on a yellow calcite druse from Elk Creek, Black Hills County, South Dakota.

Thanks to Roger Hoek's (ARCH Minerals) auction on eBay for the specimen and the image!

Row 10

Barite

A beautiful cluster of tiny light yellow barites also from the Barrick Meikle Mine, near Carlin, Elko County, Nevada.

Barite

A plate of very euhedral golden barite crystals on matrix from Czechoslovakia. Most of the barites have a green coating - probably the same mineral that's the top layer on the matrix. This small cabinet piece appears to be from an old collection.

Barite

Beautiful 3 - 9 mm rosettes of white barite on matrix comprise this small cabinet specimen from the Rosiclare Level of Minerva Mine #1, Cave-in-Rock District, Hardin County, Illinois.

Thanks to North Star Minerals' table at the 2002 Carnegie Gem & Mineral Show for the specimen!

Row 11

Barite

A beautiful cabinet specimen of rare "black" (charcoal-gray) barite prisms on limestone from the Lucky Strike Prospect, Sierra County, New Mexico.

Thanks to Tom Hales' (Museum Minerals) auction on eBay for the specimen!

Barite

A gorgeous miniature of pale olive-green barite blades from the 2003 find near Mu Li (Ebian), Sichuan Province, China.

Thanks to Jim & Linda Bowers' auction on eBay for the specimen and the images!

Barite

A beautiful miniature of white-tipped barite crystals from the now-closed limestone quarry at Aguathuna, Newfoundland.

Thanks to Marty Lewadny at CrystalEnthusia (formerly Crystal Variations) for the specimen and the image!

Row 12

Barite

A beautiful delicate barite rose thumbnail from Norman, Cleveland County, Oklahoma.

Thanks to Graeber & Himes' table at the 2003 Carnegie Gem & Mineral Show for the specimen!

Barite

A large cabinet specimen of orange barite with cerussite, linarite, and galena from the Mibladen Mine, Mibladen, Khenifra, Morocco.

Thanks to Donna & David Stowell's auction on eBay for the specimen and the images!

Barite

An excellent 2cm blue barite crystal from the Sterling Mine, Stoneham, Weld County, Colorado.

Thanks to Graeber & Himes' table at the 2004 Carnegie Gem & Mineral Show for the specimen!

Row 13

Barite, var.
Hokutolite

This is a beautiful small cabinet specimen of hokutolite (plumboan barite) from Guang 'Xi Province, China.

Thanks to Chen Hai Zhou's auction on eBay for the specimen and the images!

Bassanite

Bassanite is a dehydration product of gypsum - this miniature rose is from Pöttsching, Mattersburg, Burgenland, Austria.

Thanks to Chris Auer's (Eureka Micromounts) auction on eBay for the specimen!

Botryogen
and Voltaite

Dark amber botryogen (a hydrated iron magnesium hydroxysulfate) and green voltaite (a hydrated iron potassium aluminum sulfate) on halotrichite from Emery County, Utah - there's also some brown copiapite (a hydrated iron hydroxysulfate) present. Botryogen forms a series with zincobotryogen where zinc (and occasionally manganese) replaces the iron. Voltaite forms a series with zincovoltaite where zinc replaces the (ferrous) iron.

Thanks to Adam Larson's (Adam's Minerals) auction on eBay for the specimen!

Row 14

Carrboydite

Carrboydite's a nickel copper aluminum hydroxycarbonatosulfate - it occurs as tiny radial clusters on this miniature from the type locality of the Carr Boyd Rocks Nickel Mine, Kalgoolie, Western Australia, Australia.

Thanks to SoCal Nevada's auction on eBay for the specimen!

Celestite

Celesite (or celestine, strontium sulfate) is named for its sky-blue color which supposedly is due to colloidal gold. It's mined as an ore of strontium.

Celestite

Gray celestite and colorless calcite from the Meckley Quarry, Mandata, Northumberland County, Pennsylvania.

Thanks to Dave Hayward at Lucky Strike Minerals for the specimen and the image!

Row 15

Celestite

More celestite from the same quarry, but a single, gemmy crystal instead.

Thanks to Dave Hayward at Lucky Strike Minerals for the specimen and the image!

Celestite

A very nice specimen of red (hematite inclusions, probably) celestite from Bineu-Kyr (Beinev-Kyr), Turkmenistan.

Thanks to the Columbia Trading Company's auction on eBay for the specimen!

Celestite

This beautiful colorless celestite comes from the famous Stoneco (Scofield) Quarry in Maybee, Michigan.

Thanks to H M & D Minerals' table at the 2000 Carnegie Gem & Mineral Show for the specimen!

Row 16

Celestite

An excellent specimen of blocky white celestite from the Maumee Stone Quarry Lime City, Wood County, Ohio.

Thanks to H M & D Minerals' table at the 2000 Carnegie Gem & Mineral Show for the specimen!

Celestite

Celestite and sulfur from the sulfur mine at Machów, Tarnobrzeg, Podkarpackie, Poland.

Thanks to Gloria's Minerals' table at the 2001 Carnegie Gem & Mineral Show for the specimen!

Celestite

A nice color celestite from the Amherstburg Quarry in Amherstburg, Maldon Township, Essex County, Ontario, Canada.

Thanks to Louis Talley's auction on eBay for the specimen!

Row 17

Celestite

A small cabinet blocky white (almost massive) celestite from the Ojuela Mine, Mapimí, Durango, Mexico.

Thanks to Juan Angel Tort-Figueroa of Torreon, Mexico, for the specimens!

Celestite

This excellent cabinet specimen of colorless celestite was mined around 1986 by John Medici, who wrote the Michigan celestite deposit report for the Mineralogical Record. It's from Maybee, Monroe County, Michigan.

Thanks to Justin Zzyzx's (ZzyzxMinerals) auction on eBay for the specimen and the images!

Celestite

An odd miniature of massive folded greenish-gray celestite from a clay pit near the village of Alvanovo, Tyrgovishte district, northeast Bulgaria.

Thanks to Emil Stoyanov's auction on eBay for the specimen and the image!

Row 18

Celestite

Even though this miniature has a typical Madagascaran termination, it's from the Scofield Quarry, Maybee, Michigan. The larger image (bottom row, center) shows a sulfur inclusion "phantom" and the bottom right image shows a cluster of white phosphorescing fluorite.

Thanks to Sarah Williams' auction on eBay for the specimen!

Celestite

A very nice chisel-terminated light-blue 2-inch celestite crystal from the Holloway Quarry, Newport, Monroe County, Michigan.

Thanks to H M & D Minerals' table at the 2003 Carnegie Gem & Mineral Show for the specimen!

Celestite

This 2-inch colorless celestite crystal from the Stoneco Quarry, Portage, Wood County, Ohio has a different termination.

Thanks to H M & D Minerals' table at the 2003 Carnegie Gem & Mineral Show for the specimen!

Row 19

Celestite

A large cabinet specimen of rare "spike-terminated" celestite crystals from Madagascar.

Thanks to Michael Kaster's auction on eBay for the specimen and the images!

Celestite

A fascinating small cabinet specimen of celestite from the now-closed (to collectors) Chittenango Falls, Fenner Township, Madison County, New York. The larger image shows some of the sharp terminations.

Thanks to Val Collins' auction on eBay for the specimen!

Celestite

A miniature of celestite from Jamesville, Onondaga County, New York. It has a Larry Conklin tag and is also ex: Peter Zodac collection.

Thanks to David Poore's auction on eBay for the specimen!

Row 20

Celestite

An interesting small cabinet specimen of five sharp celestite crystals scattered about a scalenohedral calcite matrix from the famous Pugh Quarry, Custar, Wood County, Ohio.

Thanks to Walter Mroch's auction on eBay for the specimen and the image!

Celestite

A beautiful pale blue 20mm celestite floater from Dundas, Wentworth County, Ontario, Canada.

Thanks to Kim & Cindy Strange's auction on eBay for the specimen and the image!

Celestite

An excellent thumbnail of type-locality fibrous vein-filling celestite in slate from Bell's Mill, Bellwood, Blair County, Pennsylvania.

Thanks to the Carnegie Natural History Museum Store for the specimen!

Row 21

Celestite, var.
Chrysanthemum Stone

A beautiful sharp celestite "Chrysanthemum Stone" on slate from China. Other minerals can form the flower - still others can form the background. Sometimes the matrices are washed with dark coloring to highlight the flower.

Thanks to Tom Hales' (Museum Minerals) auction on eBay for the specimen!

Charlesite

A nice small cabinet specimen of charlesite (a complex hydrated calcium aluminum compound sulfate) from the Wessels Mine in the Kalahari district of Cape Province, South Africa.

Thanks to Justin Zzyzx's (ZzyzxMinerals auction on eBay for the specimen!

Coquimbite

This is a miniature of dark yellow coquimbite (ferric sulfate nonahydrate) on matrix from Emery County, Utah - probably the Dexter #7 Mine.

Thanks to Adam Larson's (Adam's Minerals) auction on eBay for the specimen!

Row 22

Coquimbite and
Amarantite

This is a cabinet specimen of the iron sulfates, coquimbite - spelled "cokambite" on the label - and amarantite (ferric hydroxysulfate trihydrate) on matrix from Antofagasta (the type locality for amarantite), Chile. They're both the same color and occur here as an admixed coating. Coquimbite's dimorphic with paraoquimbite.

Thanks to Jeff & Heather McCammon's (Second Nature Colorado) auction on eBay for the specimen and the images!

Coquimbite

Coquimbite can also be light-violet in color, as this beautiful small cabinet specimen from the Dexter #7 Mine shows. Most of the crystals are eroded, but there's at least one very sharp crystal (larger image, middle right). There's also some blue pisanite (larger image, bottom left) and tiny black voltaite crystals (larger image, bottom right).

Thanks to Michael Flaherty's auction on eBay for the specimen!

Creedite

A cluster of light-brown (iron-stained) creedite (a hydrated calcium aluminum sulfate with fluoride and hydroxide cations) from Mina Navidad, Durango, Mexico. Because of the predominating fluoride and hydroxide ions, some references classify creedite with the halogenides - its physical properties much more resemble the sulfates.

Row 23

Creedite

A gemmy cluster of violet creedite from the Hall Mine in Nye County, Nevada.

Thanks to Frank P. Butler's auction on eBay for the specimen and the image!

Creedite

A beautiful miniature of sparkling colorless creedite on blue-green fluorite from the Navidad Mine, Durango, Mexico

Thanks to Juan Angel Tort-Figueroa of Torreon, Mexico, for the specimens!

Creedite

A beautiful thumbnail of gemmy lavender creedite from the Potosi Mine, Francisco Portillo, Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico. The main crystal has a sharp termination (larger image, bottom).

Thanks to Candace Delaney's auction on eBay for the specimen and the image!

Row 24

Emmonsite

A small patch of green emmonsite (a hydrated iron tellurite) on a thumbnail matrix from the San Miguel Mine, Moctezuma, Sonora, Mexico.

Thanks to David H. Garske's (MINERALS and MORE) auction on eBay for the specimen!

Ettringite

A very pretty thumbnail of yellow ettringite (a calcium aluminum hydroxysulfate) on black manganite from the N'Chwaning Mine in the Kalahari Manganese Fields of South Africa - the ettringite appears greenish because it's so transparent that the black manganite shows through.

Thanks to Craig Ackermann's (KalahariMinerals.com) auction on eBay for the specimen and the images!

Ettringite

A large thumbnail of ettringite crystals on matrix from the N'Chwaning II Mine, Kalahari Manganese Fields, Kuruman, South Africa.

Thanks to Craig Ackermann's (KalahariMinerals.com) auction on eBay for the specimen and the image!

Row 25

Ettringite

An interesting thumbnail aasociation of a black gaudyfroyite crystal and red andradites on a terminated ettringite crystal, again, from the N'Chwaning II Mine.

Thanks to Mike Keim at Marin Minerals for the specimen and the image!

Ettringite

A beautiful thumbnail of gemmy, bright yellow ettringite from the October 2003 find at the Wessels Mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa. The crystals are terminated by prisms truncated by a pinacoid.

Thanks to Kathy Wittwer's auction on eBay for the specimen!

Ettringite

A thumbnail of white radial acicular ettringite on matrix from Pendeen, St. Just, Cornwall, England. Ettringite, when found in concrete, is a marker for accelerated deterioration, see Delayed (or Secondary) Ettringite Formation in the literature.

Thanks to Colleen Thomson's Thomson Minerals auction on eBay for the specimen and the image!

Row 26

Fibroferrite

A beautiful thumbnail of parallel-fiber clusters (closeup, larger image) of fibroferrite (iron (III) hydroxysulfate pentahydrate) from Emery County, Utah.

Thanks to Adam Larson's (Adam's Minerals) auction on eBay for the specimen and the image!

Glauberite

The crystal habit of glauberite (a slightly soluble sodium calcium sulfate) is distinctive. This specimen may be a pseudomorph since it doesn't dissolve and it's harder than true glauberite. It's named after the German chemist Johann Glauber and used as a source of Glauber's salt (sodium sulfate).

Gypsum

An old miniature of gypsum (calcium sulfate dihydrate) from Windsor, Nova Scotia, Hants County, Canada. The specimen is entirely gypsum - in two habits; white, fine-grained and tan "plumose" radial aggregates. It dates from the late 1800's - ex: L.L. Hubbard collection.

Thanks to Thomas Bee's auction on eBay for the specimen and the image!

Row 27

Gypsum,
var. Satin Spar

This is the "satin spar" selenite variety of gypsum.

 

Gypsum,
var. Selenite

This is a beautiful thumbnail of sage green translucent satin-spar selenite from St. Mary's, Maryland.

Thanks to the Carnegie Natural History Museum Store for the specimen!

Row 28

Gypsum,
var. Selenite

This is another gypsum variety called "desert rose" or "selenite rose". Most dealers' selenite roses have been "brushed" with a propane torch to create the white "petal" edges.

Gypsum,
var. Selenite

A bouquet of selenite roses from the Red River Floodway, Winnipeg, Manitoba, Canada.They fluoresce a brillant white under longwave UV, with a light green phosphorescence.

Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen and the image!

Gypsum,
var. Selenite

A cabinet cluster of selenites from Naica, Chihuahua, Mexico.

Thanks to Bob Keller at the Arizona Mineral Company for the specimen and the image!
Image copyrighted by the Arizona Mineral Company.

Row 29

Gypsum,
var. Selenite

Beautiful light green fragile selenite needles from the Pernatty Lagoon Mount Gunson, South Australia, Australia - possibly the only location for this rare color.

Gypsum,
var. Selenite

Orange selenite from the Red River Floodway, Manitoba, Canada.

Thanks to Marty Lewadny at CrystalEnthusia (formerly Crystal Variations) for the specimen and the image!

Gypsum,
var. Selenite

Another selenite from the Red River Floodway - this one was just too pretty to pass up!

Thanks to Dave Hayward at Lucky Strike Minerals for the specimen and the image!

Row 30

Gypsum,
var. Selenite

A sharp cluster of colorless selenite from Cavnic, Romania.

Thanks to Gary Lozonne at Lozonne's Minerals for the specimen!

Gypsum,
var. Selenite

Willow Creek, near Nanton, Alberta, Canada is famous for these beautiful clear selenite rhombs. Under longwave UV their zonal fluorescence is amazing - the end-on view (bottom, larger picture) shows that the fluorescence is also split between the top and bottom "halves".

Thanks to Wright's Rock Shop's table at the Carnegie Gem & Mineral Show for the specimen!

Gypsum,
var. Selenite on
Dolomite

There's an interesting mix of selenite on dolomite in this specimen from Bou Becker, Touissit, Oujda, Morocco - the dolomite changes color from white through orange to red while the selenite changes to green (probable brochantite inclusions).

Thanks to Darrel Merke's auction on eBay for the specimen and the image!

Row 31

Gypsum,
var. Selenite

This is an old (1960s) and rare miniature of Christmas Tree selenite from Copperus Creek near Wynne, Cross County, Arkansas.

Thanks to John Siewiorek's auction on eBay for the specimen!

Gypsum,
var. Selenite

From the old to the new - this is from the 2001 find of yellow selenite on a selenite matrix from Mina Salido, Pisco, Peru (not to be confused with the equally new yellow selenite on colorless halite found at Los Salinas, Ica, Peru).

Thanks to Mike Keim at Marin Minerals for the specimen and the image!

Gypsum,
var. Selenite

A doubly-terminated selenite crystal with inclusions from the Great Salt Plains Reservoir, north of Jet, Alfala County, Oklahoma, collected back in the early 60s.

Thanks to Olympic Mountain Gems, Inc. for the specimen!

Row 32

Gypsum,
var. Selenite

This golden selenite's from the other new find in 2001 at Los Salinas, Ica, Peru. In addition to it being on a halite matrix, these specimens usually have clusters of selenites - I've enhanced the contrast on the cluster closeups to show the detail.

Gypsum,
var. Selenite

A large cluster of orange selenite from the salt lakes around Mount Gunson, South Australia.

Thanks to Tom Hales' auction on eBay for the specimen and image!

Gypsum,
var. Selenite

An excellent stack of selenite crystals from the Swift Current watershed in Saskatchewan, Canada.

Thanks to Donna Lee Hanlon's (Donna's Treasures) auction on eBay for the specimen!

Row 33

Halotrichite

A beautiful (and very fragile) specimen of halotrichite (an iron aluminum sulfate) from the long-closed Flux Mine, Harshaw District, Patagonia Montains, Santa Cruz County, Arizona. Some of the halotrichite is colored blue and green by copper. Halotrichite forms a series with pickeringite, its magnesium analog and is closely related to apjohnite, its manganese analog.

Thanks to Wayne Bloechl's (GeoJoe's) auction on eBay for the specimen!

Hanksite

A single crystal of hanksite from the type locality of Searles Lake, San Bernardino County, California. The second image (larger picture, right) is backlit to show the darker green center.

Honessite

A miniature of green fibrous honessite (a hydrated nickel iron hydroxysulfate) with millerite in a geode from Hall's Gap, Lincoln County, Kentucky. It's the sulfate analog of reevesite.

Thanks to Jennings "Beau" Gordon's (Jendon Minerals) auction on eBay for the specimen and the image!

Row 34

Jarosite

A miniature of brown jarosite (iron potassium hydroxysulfate) crystals (rare!) on limonite from the type locality of Barranco Jaroso, Sierra Almagrera, Spain. In March 2004, the Mars rover Opportunity found jarosite on Mars!

Thanks to Tony Nikischer at the Excalibur Mineral Company for the specimen!

Jarosite

A small cabinet specimen of brown jarosite on matrix - the larger image shows a miniature with yellow jarosite - the antique French label just has Nevada and Utah for the locales.

Thanks to Steve & Susan Bringe's (Summit Minerals) auction on eBay for the specimen and the image!

Klebelsbergite
on Stibnite

Klebelsbergite (an antimony oxyhydroxysulfate) occurs on stibnite as a weathering product. This rare miniature's from the Pereta (antimony) Mine, Gosseto Province, Tuscany, Italy.

Thanks to Chris Korpi at Pangaea Minerals for the specimen!

Row 35

Langbeinite
and
Leonite

An esthetic miniature of orange translucent langbeinite (potassium magnesium sulfate) in white leonite (hydrated potassium magnesium sulfate - an alteration product) from the Carlsbad (Potash District), Eddy County, New Mexico.

Thanks to Kim & Cindy Strange's auction on eBay for the specimen and the image!

Mackayite

Mackayite's an iron hydroxyditellurite - most mineralogy guides now simply call it a mixed oxide. This micromount's from the famous Goldfield, Esmeralda County, Nevada locale.

Thanks to Don Smoley's Minerals & Gems' table at the Carnegie Gem & Mineral Show for the specimen!

Melanterite,
var. Pisanite

When copper replaces some of the iron in melanterite (iron sulphate heptahydrate), it becomes pisanite (or cuprian melanterite). This beautiful miniature was collected in the mid-60s by Hatfield Goudey near Wellington, Nevada, and has the original label. It's especially rare to find such large curved crystals (larger image, center); usually pisanite (and melanterite) is a crusty coating.

Thanks to Jan Garland's (Fine Rocks) auction on eBay for the specimen!

Row 36

Millosevichite

Millosevichite is a rare aluminum iron sulfate that forms an incomplete series with mikasaite. This thumbnail comes from Libusin, Kladno, Bohemia, Czech Republic.

Thanks to Thomas Bee's auction on eBay for the specimen!

Nakauriite

Nakauriite is a rare hydrated manganese nickel copper hydroxycarbonatosulfate that usually occurs as compacted sky-blue fibers in a serpentine matrix, as in this miniature from Lancaster County, Pennsylvania. Some references only list the copper anion but the latest analyses show the manganese and nickel content to be significantly higher than the copper.

Thanks to John Coolidge's auction on eBay for the specimen and the image!

Natrojarosite

An excellent thumbnail of yellow drusy (and sphericular) natrojarosite (an iron (III) sodium hydroxysulfate) in basalt vesicles from Elba Island, Tuscany, Italy.

Thanks to Sue Silver's auction on eBay for the specimen and the image!

Row 37

Peretaite

Peretaite is usually a colorless mineral (a hydrated antimony calcium hydroxysulfate) - the peretaite crystals in the vugs in this miniature from the type locality of the Pereta Mine, near Scansano, Grosetto, Tuscany, Italy are colored red by probable kermesite (larger image, bottom left). There's also tufts of white klebelsbergite and yellow valentinite present on the stibnite matrix.

Thanks to Anthony Jones' auction on eBay for the specimen!

Pickeringite

A vein of sky-blue (even though my photo doesn't show it) fibrous pickeringite, a hydrated aluminum magnesium sulfate) in an unidentified sulfate matrix from Chuquicamata, Antofagasta, Chile. It forms a complete series with halotrichite and possibly an incomplete series with apjohnite, its manganese analog. This small cabinet specimen is from the Scott Turner Collection (Director of the U.S. Bureau of Mines during the Hoover administration).

Thanks to Thomas Bee's auction on eBay for the specimen!

Pickeringite,
var, Bosjemanite

A thumbnail of yellowish-tan bosjemanite (manganoan pickerite) from the Old Alum mine at Intschi, Kanton Uri, Switzerland. This may also be the same mineral as bushmanite - they both are members of the pickeringite-apjohnite series.

Thanks to Claus Hedegaard's auction on eBay for the specimen!

Row 38

Plumbojarosite

Yellowish-green plumbojarosite (an iron lead hydroxysulfate) shares the matrix with chrysocolla in this miniature from the Silver Reef District of Pinal County, Arizona. It's from the Allen W. Pinger Collection (1897-1975; Assistant Geologist for Cleveland Cliffs Iron Company of Michigan; Empire Zinc Company; and Geologist for the New Jersey Zinc Company).

Thanks to Thomas Bee's auction on eBay for the specimen!

Römerite

An interesting large cabinet specimen of blocky reddish-brown römerite (a hydrated ferrous sulfate) with lavender coquimbite crystals (larger image, bottom left) and light blue fibrous halotrichite (larger image, bottom right) from the Dexter #7 Mine, San Rafael Swell, Emery County, Utah. Collected by Robert Stoufer in the late 1980s.

Thanks to Robert Stoufer's auction on eBay for the specimen!

Rostite and
Rozenite

A white efflorescence of rostite (a hydrated aluminum fluorohydroxysulfate) with white fibrous rozenite (another hydrated ferrous sulfate) on a matrix of mostly selenite from the Cetine Mine, near Siena, Tuscany, Italy.

Thanks to Tony Jones' auction on eBay for the specimen!

Row 39

Spiroffite
with Tellurite

A micromount of pink spiroffite (a manganese zinc tellurite) coated with light yellow tellurite (tellurium oxide) from the type locality of the Moctezuma Mine, Moctezuma, Mun. de Moctezuma, Sonora, Mexico.

Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen and the image!

Sturmanite

A cute little cluster of sturmanites (a hydrated calcium iron aluminum manganese sulfate tetrahydroxoborate hydroxide) from the N'Chwaning II Mine, Kuruman, Northern Cape, Republic of South Africa. Sturmanite was named in 1983 - all the specimens I have date from that mine's 1983 - 85 heyday.

Thanks to Graeber & Himes's table at the 2000 Carnegie Gem & Mineral Show for the specimen!

Sturmanite

This small cabinet of sturmanite and manganite on matrix is also from the N'Chwaning II Mine.

Thanks to Steiner's Rockshop auction on eBay for the specimen and images!

Row 40

Sturmanite

A large thumbnail of a double-terminated etched sturmanite crystal from the N'Chwaning II Mine.

Thanks to Debbie Woolf at Steiner's Rockshop's auction on eBay for the specimen and images!

Sturmanite

A odd thumbnail cluster of sturmanite crystals, again from the N'Chwaning II Mine - these appear to have a waxy, almost opaque coating.

Thanks to Charles Creekmur's auction on eBay for the specimen!

Sturmanite

This miniature of brown sturmanite crystals on a manganite matrix, even though it's from the N'Chwaning II Mine, looks completely different! The backside has a few transparent yellow sturmanite crystals (larger image, top right) as well. A very unusual specimen!

Thanks to Debbie Woolf at Steiner's Rockshop's auction on eBay for the specimen and images!

Row 41

Svanbergite

This miniature of rose svanbergite (a strontium aluminum hydroxyphosphatosulfate) on matrix is from the Västanå Iron  Mine, Näsum, Bromölla, Skåne, Sweden. Some references classify this with the phosphates - it's the stronium analog of woodhouseite and forms an incomplete series with lead-bearing hinsdalite. The larger image shows (bottom left) probable calcite with strong color zoning and (bottom right) an unidentified fibrous mineral. It's from the Harry Uhl Collection (acquired in the 1960s).

Thanks to Jennings "Beau" Gordon's (Jendon Minerals) auction on eBay for the specimen!

Thenardite

An excellent miniature of sharp gray-green heavily-included thenardite (anhydrous sodium sulfate) crystals from Soda Lake, San Luis Obispo County, California. Thenardite's water-soluble (gradually changing to mirabilite, sodium sulfate decahydrate) so I'll have to keep this one in a sealed container.

Thanks to Don Smoley's Minerals & Gems' table at the 2004 Carnegie Gem & Mineral Show for the specimen!

Tschermigite

Naturally-occuring tschermigite (ammonium aluminum sulfate dodecahydrate or ammonium alum) is NOT this color - this pretty miniature is from a lab in Ekaterinaberg, Russia.

Thanks to the Fersman Mineralogical Institute's table at the 2004 Carnegie Gem & Mineral Show for the specimen!

Row 42

Wilcoxite

White deposits of wilcoxite (a hydrated aluminum magnesium fluosulfate) on a tan matrix comprise this miniature from Silver City, Grant County, New Mexico. It's a member of the aubertite group and will dissolve in cold water, so I'm keeping it cool, dark, and dry!

Thanks to Tony Nikischer at the Excalibur Mineral Company for the specimen!

Woodhouseite

Woodhouseite is a rare calcium aluminum hydroxyphosphatosulfate that is almost exclusively from a single location (4 miles WSW) of the Champion andalusite mine on the western slopes of the White Mountain Peak north of Laws, Mono County, California. It forms pseudocubic diagonally-striated (larger image, top right) crystals. This miniature also has a quartz matrix with tiny rutile starbursts (larger image, bottom left) and sapphire (larger image, bottom right). The sapphire at this locale is colored blue only by titanium and not by the more common iron-titanium mix elsewhere. It's the calcium analog of svanbergite and is named after Charles Douglas Woodhouse, collector, professor at UCSB, and founder of the California Federation of Mineral Societies.

Thanks to Steve & Susan Bringe at Summit Minerals for the specimen!

Wupatkiite

A beautiful small miniature of light-pink wupatkiite (a hydrated aluminum cobalt magnesium nickel sulfate) acicular aggregates from the Lorena Gold Mine in Cloncurry, Queensland, Australia. The cobalt gives it its color. It can be considered an aluminum cobalt pseudoalum and is a member of the halotrichite group.

Thanks to Darrel Merke's (Proton Minerals) auction on eBay for the specimen and the image!

maintained by: Alan Guisewite

Last Update 8 Apr 2012