| 8 Rows |
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 Ferberite
Ferberite's the iron-rich end of the ferberite - wolframite - huebnerite series. This ferberite cluster on muscovite is from the Yaogangxian Mine, Yizhang County, Hunan Province, China. The closeup (larger image, right) shows a small pocket of purple fluorites on the bottom. It also forms an incomplete series with sanmartinite, where zinc replaces part of the iron. Thanks to Dave Hayward at Lucky Strike Minerals for the specimen and the image! |
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 Ferberite
This ferberite from Ward District, Boulder County, Colorado occurs as a fine druse. Thanks to Frank Butler's auction on eBay for the specimen and the images! |
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 Ferrimolybdite
Yellow acicular ferrimolybdite (iron molybdate octahydrate) on milky quartz from the Questa Molybdenum Mine, Questa, Taos County, New Mexico - there's also a molybdenite crystal on the right. Thanks to Dan Wienrich at Dan & Jill Weinrich for the specimen and the image! |
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| Row 2 |
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 Ferrimolybdite
An old (1970s) large thumbnail of yellow ferrimolybdite druse and seams with molybdenite in a zinnwaldite and quartz matrix from the California Mine, Mount Antero, Chaffee County, Colorado. Thanks to Robert Stoufer's auction on eBay for the specimen and the image! |
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 Hübnerite
A nice hübnerite (manganese tungsten mixed oxide) crystal with attached fluorite and quartz from the Pasto Bueno district, Ancash Department, Peru. It was once considered to be manganese tungstate, but analyses have shown that there are no WO4 tetrahedra present. |
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 Hübnerite
The manganese-rich member of the wolframite series is hübnerite - this micro topped with quartz crystals is from the Black Pine Mine, Granite County, Montana. Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen and the image! |
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| Row 3 |
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 Hübnerite
A very nice thumbnail of hübnerite from San Juan County, Colorado. Thanks to Frank P. Butler's auction on eBay for the specimen and the images! |
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 Hübnerite
An excellent thumbnail of stacked hübnerites from the mines in the Pasto Bueno District, Pallasca Province, Ancash Department, Peru Thanks to Saul Krotki's auction on eBay for the specimen and the images! |
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 Kamiokite
A miniature of very rare black kamiokite (iron trimolybdate) in matrix from the Vrchoslav fluorite deposit, Krupka, Teplice, Krusné Hory (Erzgebirge), Bohemia, Czech Republic. Thanks to Thomas Bee's auction on eBay for the specimen and the images! |
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| Row 4 |
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 Mendozavilite
Mendozavilite's a rare, complex sodium calcium magnesium iron chlorophosphomolybdate that usually occurs as orange crusts as in this specimen from the Rustler Mine, Tooele County, Utah - the yellower patches may be paramendozavilite, a similar mineral in which aluminum replaces the calcium and magnesium. Thanks to Emilie & Ron Kendig's auction on eBay for the specimen! |
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 Powellite
An excellent miniature of a sharp powellite (calcium molybdate) crystal from a quarry near Shirdi in the Pandulena Mountains, Nasik, Maharashtra, India. It forms an incomplete series with scheelite and this specimen glows a bright lemon yellow under LUV. Thanks to Jason at indiarockhounder for the specimen and the image! |
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| Row 5 |
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 Powellite, var.
Cupropowellite
Copper can replace some of the calcium in powellite - turning the crystals greenish-yellow, as in this miniature from the Jardinera No. 1 Mine, Inca de Oro, Copiapó, Atacama Province, Chile, and turning off the fluorescence. Thanks to Justin Butt's (MinWreck) auction on eBay for the specimen and the images! |
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 Scheelite
Two small light orange scheelites (calcium tungstate) ride on this mixed sulfide matrix with enargite from the Huanzala Mine, Huanuco Department, Peru. Thanks to Dave Hayward at Lucky Strike Minerals for the specimen and the image! |
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 Scheelite
Scheelite's one of the major tungsten ores - this one comes from the Yaogangxian Mine, Yizhang County, in the Hunan Province of China. It forms a series with its molybdate analog, powellite. There's also some purple fluorites and pearlescent white dolomite riding on the doubly-terminated smoky quartz crystal. Thanks to Greg Holland at Stone Haven Minerals for the specimen! | |
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| Row 6 |
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 Scheelite
A nice orange scheelite on muscovite from China. |
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 Scheelite
A cute little colorless scheelite crystal from Kern County, California. Thanks to Thomas Bee's auction on eBay for the specimen! |
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 Scheelite
Sharp tan scheelite crystals on dolomite and quartz also from the Yaogangxian Mine in China. Thanks to Roger Hoek at ARCH Mineralsfor the specimen! |
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| Row 7 |
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 Scheelite
A thumbnail cluster of scheelites from Xue Bao Ding, Ping Wu, Sichuan Province, China. Thanks to Stuart Schneider's auction on eBay for the specimen and the image! |
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 Scheelite
A sharp 7mm brown scheelite crystal on a quartz matrix from the Taewha Mine, Changju, Korea. This locality was written up in Mineralogical Record, Vol. 10, No. 3. Most of the quartz is coated with scheelite - it all glows blue under SUV (larger image, right). Ex: World Minerals, Inc, (Ray Thompson, Denver), and Mexico Bureau of Mines & Mineral
Resources Museum. Thanks to Dru Wilbur's auction on eBay for the specimen and the images! | |
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 Scheelite
A beautiful 3cm scheelite crystal on a muscovite matrix with quartz and probable powellite (larger image, lower right) also from Xue Bao Ding in China. Thanks to Steve & Susan Bringe's (Summit Minerals) auction on eBay for the specimen! | |
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| Row 8 |
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 Scheelite
A old thumbnail scheelite crystal from Yung Wha, (Yeonwha?) Korea. Thanks to Jan Garland's (Fine Rocks) auction on eBay for the specimen and the images! |
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 Wolframite
A beautiful wolframite crystal with attached quartz from China. Wolframite is the midmember of the ferberite-hubnerite series and is often used generically for all three. Thanks to Miao Yang's auction on eBay for the specimen! | |
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 Wolframite
and Scheelite
Two pounds of milky quartz, arsenopyrite, lavender fluorite, tan scheelite, and white calcite on a wolframite matrix also from the Yaogangxian Mine in China. An impressive and fascinating specimen. Thanks to Miao Yang's auction on eBay for the specimen and image! | |
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