Friday, 18 August 2017

Diaspore a part of the National Gem Collection

In 2014 two large, rare color-changing diaspore gemstones were donated to the Smithsonian Institution’s National Gem Collection, thanks to Milenyum Mining Ltd.

The Dubai-based miner donated the stones, a 44.48-carat faceted oval-shaped diaspore and a 159.33-carat cat’s eye cabochon diaspore, at the American Gem Trade Association’s GemFair.
Diaspore is a naturally color-changing gem, and is mined at only one source, the Anatolia Mountains of Turkey. Milenyum is the only company that mines the gemstone.

Zultanite and Csarite are trade names.
Diaspore is a durable gemstone with a hardness of 6.5 – 7 on the MOHS scale. Since Diaspore has perfect cleavage in one direction it can be difficult to cut because parts of the stone will cleave off.

Typical loss cutting rough diaspore is 98 percent. This makes large gemstones extremely rare and valuable.
“To our knowledge, currently there are fewer than 20 faceted csarite gemstones in the world that have a weight of 40 carats and above. Given the rarity of this unusual gem, we feel the Smithsonian’s National Gem Collection is a fitting home for two of the few examples available in this size and quality,” said Milenyum Mining President Murat Akgun.

The National Gem Collection is housed at the National Museum of Natural History in Washington.