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Diaspore

Zultanite, a gem variety of diaspore, only occurs in the mountainous region of Anatolia, Turkey. The gem exhibits the optical property called "color change." Zultanite gems turn from yellowish-green to purplish-pink depending on the light source. Sizes over 5 carats are very rare. Gem quality crystals were first discovered in the early 1980s, but only recently have they been commercially mined. Zultanite is a natural gem that has not been enhanced or treated. This Zultanite gem is a nice upgrade to the two diaspores already in the Collection.

Image Number: Ken Larsen
Catalog Number: G10560
Weight: 9.66 carats
Gift of Yoshi Kirsch , 2008
Locality: Anatolia , Turkey

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Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits