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Beautiful specimen of well crystallized black augite crystals covering orange calcite matrix
2tcw lot of beautiful rough emeralds
Northern Territory
This is a superb looking Dhofar 221 classified meteorite weighing 63
Cassiterite Crystals | Black | Lot in a Jar | Tin Gulch, Grant Co. | New Mexico | SO24 Zagora Meteorite Beautiful specimen of well crystallizedMost cassiterite crystals have opaque, dark colors, usually black or brown. Lighter colored, facetable crystals are much rarer and usually occur in small fragments. With a dispersion or fire almost twice that of diamond as well as vitreous to adamantine luster, transparency, and a hardness of 6 7, faceted cassiterites would make good jewelry stones. Cassiterite is a durable gemstone with tremendous dispersive fire, especially visible in properly cut
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