11.18 ct Outstanding Cushion Cabochon (20 x 14 mm) Un-Heated Change Diaspore

Description

11.18 ct Outstanding Cushion Cabochon Shape (20 x 14 mm) Un-Heated Color Change Diaspore Natural Gemstone
Color Change From Olive Green to Purplish Red. Orgin From Turkey Mined From Earth
100% Natural Genuine & Mined from Earth Gemstone !!!
Gem Type
Diaspore
Color
Olive Green
Shape
Cushion Cabochon
Size (LxWxD)
20.43 x 14.43 x 3.72 mm
Weight
11.18 ct
Grade
AAA
Hardness
7.0
Luster
Excellent
Clarity
VVS-VS
Treatment
Un-Heated
Origin
Turkey
RefractiveIndex
1.682 - 1.706
Specific Gravity
3.25
FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2
L1
L2
L3
L4
Flawless Internally
Flawless
Very Very Slightly
Imperfect
Very Slightly Imperfect
Slightly Imperfect
Imperfect
Opaque
Diaspore
Mohs Hardness - 7.0 - Found in - Turkey. Sometimes known in the trade as "Csarite" Diaspore is an aluminum oxide hydroxide mineral, crystallizing in the orthorhombic system and isomorphous with goethite. It occurs sometimes as flattened crystals, but usually as lamellar or scaly masses, the flattened surface being a direction of perfect cleavage on which the lustre is markedly pearly in character. It is colorless or greyish-white, yellowish, sometimes violet in color, and varies from translucent to transparent. It may be readily distinguished from other colorless transparent minerals with a perfect cleavage and pearly luster, like mica, talc, brucite, and gypsum by its greater hardness of 6.5 - 7. The specific gravity is 3.4. When heated before the blowpipe it decrepitates violently, breaking up into white pearly scales.
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