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Gemological information about Peanut Obsidian:
62mm Weight in grams: 18
It contains more than 85% silica and other minerals
Cabochon en garniérite
Spectre: Non visible
VENDU Tourmaline Noire Druzy 7 oeil de tigre Gemological information about Peanut Obsidian:Black tourmaline druzy cabochon. Black Shape: Round Size: 36. 94mm diameter Weight in grams: 26. 20g Carat weight: 131 carat Country of origin: Madagascar Gemological information about tourmaline: Density: Between 2. 84 and 3. 40 Hardness: Between 7 and 7. 5 Crystal system: Trigonal Fracture: Subconchoidal to irregular Cleavage: None Polariscope: Anisotropic (restores all 90 except in the optical axis) Refractive index: Ne: 1. 603 to 1. 772 No: 1. 619
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