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**COLOUR-CHANGE ZULTANITE** 4.04 ct TURKEY RARITY COLLECTORS PC OVAL CUT| ERV R47 511
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Product information
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Diaspore has reasonably good gemstone characteristics. It has a hardness of 6.5 to 7 on the Mohs scale, comparable to peridot and tanzanite. It has a refractive index of 1.702 to 1.750, which lies between that of tanzanite and spinel. Diaspore has perfect cleavage in one direction, making it a challenge to cut.
Gems that change color under different lighting are rare and diapsore is attracting buyers who are drawn to this unique quality. Under natural or fluorescent light, diapsore has a kiwi/olive green color, with flashes of yellow. Under incandescent lighting, this shifts to a champagne color, and when exposed to subdued lighting, such as candlelight, diaspore has a pinkish/reddish color. The larger the stone, the more pronounced the color change effect.
To date, the only gem-quality material has been mined in Turkey.
GEM TYPE : Diaspore Zultanite
TOTAL CARAT WEIGHT :
4.04 Cts
SIZE : (LxWxH) 11.26 x 7.97 x 5.36 MM
SHAPE : Oval
COLOUR: Olive Green to Red
HARDNESS : 7.0 MOH'S SCALE
QUANTITY : 1 Pc
CLARITY : VVS1 - VS-2
ORIGIN : Turkey
TREATMENT : Unheated / Untreated.
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