abraxas                 a magical name which in antiquity was often
                        engraved on a gem as a charm.
morion                  a dark variety of smoky quartz.
padparadschah           a synthetic orange sapphire.
Venus hairstone         a quartz crystal containing acicular rutile.
prase                   a leek-green cryptocrystalline chalcedony.
balas                   a rose-red species of spinel.
schorl                  black tourmaline.
carbonado               to score and broil; a piece of meat so cooked.
ustulate                scorched, blackened.
carbonado               a Brazilian variety of black diamond.
girasol                 an opal; a Jerusalem artichoke.
                        adjectivally, opalescent blue-white, with
                        reddish reflections. [<It, eq. /girare/ to
                        turn + /sole/ sun]
adularescent            (of gemstones, esp. |adularia|, an opalescent
                        orthoclase) having a cloudy, bluish luster.
smaragd                 an emerald.  (adj. "smaragdine")
pyrope                  a type of garnet, used as a gem.  [< Gk
                        /pyro~po's/ fire-eyed]
macle                   (crystallography, obs.) a twin.