April 12, 2024
Sunstone 1200 cts rough gemstones cab lbs specimen D172
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Sunstone 1200 cts rough gemstones cab specimen or semi facet rule shows inches ___________________________ THE GEMSTONES IN THIS AD ARE not stock photos thay are of the gemstones you will receive. _____________________________ ALL GEMSTONES AND ROUGH ARE GENUINE NATURAL GEMSTONES lighting used was standerd 100 watt light bulb. good for cabbing or facet also wire wrap of rough crystals Genuine Gemstones Genuine natural gemstone-not man made _________________________________________________________________________________ Feldspar (aluminum silicates) Types/Color: Bytownite - Pale yellow to brown. Labradorite - Pale yellow to gray with play of color. Orthoclase - Colorless, champagne to yellow. Sunstone - Colorless, champagne, copper inclusions can produce a red or green color. Moh's hardness: 6-6.5 Refractive index: 1.52-1.568 Critical angle: 41° Specific gravity: 2.5-2.7 Cleavage: Perfect in 3 directions. Fracture: Uneven, somewhat brittle. Dispersion: Low (.012), but the combination of a high polish and minute inclusions can simulate the effect of moderate dispersion. Heat sensitivity: Low Pleochroism: None Birefringence (double refraction): Weak to medium (.005-.01) Crystal structure: Triclinic (bytownite, labradorite and sunstone) Monoclinic (orthoclase). Cutting: Cleavage usually doesn't present a
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