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673 Birefringence: Most of the time it is zero Chelsea Filter: Inert Spectrum: Not observable / not diagnostic Different countries where black jade may be mined: Japan
66mm Weight in grams: 18
blackish-green Shape: Rectangle Size: 24
- Heating blue tanzanite to improve its color
Cleavage: Along the faces of the octahedron
VENDU Kammererite 14 Forme diamant 673 Birefringence: Most of theKammererite cabochon. Color: Purple Shape: Drop Size: 42. 35 x 29. 46mm Weight in grams: 13. 17g Carat weight: 65. 87 carat Country of origin: Russia (Siberia) Gemological information about kammererite: Possible colors: Red, red purple, red magenta, magenta, dark magenta to purple). Other name: Clinochlore, chromiferous variety Density: Around 2. 64 Hardness: Between 2 and 3 Crystal system: Monoclinic Fracture: Depending on the cleavage plane,
