Tuesday, March 31, 2015

Turkish diaspore

Diaspore is one of the three component minerals of the economically important aluminum ore bauxite.
Though most forms of diaspore are of little interest, large crystals unlike any others were found in Turkey in the 1950's in a commercial bauxite deposit.

This deposit has become the source of mining operations producing gem-grade crystals that are cut into gemstones. The company operating the gem diaspore mine was previously called Zultanite Gems LLC.
Diaspore is beautiful and exotic in a soft, subtle manner. It is also one of the lesser known of the color-change gemstones. Diaspore has good hardness at 6.5-7 on the Mohs scale, but it is known to be brittle and can cleave.

Most diaspore is colorless to very pale. The beauty and intrigue of this gemstone is seen when there is sufficient color saturation to exhibit the color change phenomenon that most diaspore is known for.
A new trade name, Csarite, is now being applied to the mineral. The Courtney Collection has been named as the first authorized distributor of Csarite in the United States.

The Courtney Collection is the new loose coloured gemstone division of the Los Angeles-based Erica Courtney, Inc. It will focus on collectible, rare and interesting gemstones.

Dubai--Two large, rare color-changing csarite gemstones are now in the Smithsonian Institution’s National Gem Collection, thanks to a donation from Milenyum Mining Ltd.

The Dubai-based miner donated the stones, a 44.48-carat faceted oval-shaped csarite and a 159.33-carat cat’s eye cabochon csarite, at the American Gem Trade Association’s GemFair, which took place Feb. 4 to 9 in Tucson.
“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. It consists of over 350,000 mineral specimens and 10,000 gemstones, including the Hope Diamond, making it one of the largest of its kind in the word.

See ----->http://pennystockjournal.blogspot.ca/2014/02/drop-dead-gorgeous-rings-from-erica.html
See ----->http://pennystockjournal.blogspot.ca/2014/12/smithsonian-gemstones.html
See ----->http://pennystockjournal.blogspot.ca/2014/06/national-gem-collection-smithsonian.html