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The chemical composition of most peridots is often very close to forsterite
- Optical fiber
76 carat Country of origin: Russia (Siberia) Gemological information about kammererite: Possible colors: Red
Carat weight: 109
Isostructural (avec Berlinite)
VENDU Malachite 90 Ovale The chemical composition of mostMalachite cabochon. Color: Light green to dark green zoning Shape: Drop Size: 40. 38 x 35. 42mm Weight in grams: 17. 81g Carat weight: 89. 04 carat Country of origin: Congo Gemological information about malachite: Possible color: Light green to dark green with zoning Density: Between 3. 60 and 4. 05 Hardness: Between 3. 5 and 4 Crystal system: Monoclonic Fracture: Subconchoidal to coarse grained Cleavage: Perfect Polariscope: Opaque Refractive index:
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