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58 Hardness: between 3
Shape: Diamond Size: 36
20g Carat weight: 61
garnet / glass doublet
mocha stone
Perles en tanzanite Rectangle 58 Hardness: between 3Tanzanite beads. Color: Purple Size: 6mm Country of origin: Tanzania Gemological information about tanzanite: Note: It is a variety of zoisite Possible color: Blue, dark blue, blue purple, violet, magenta Hardness: Between 6 and 6. 5 Crystal system: Orthorhombic Breakage: Irregular Cleavage: Perfect Polariscope: Anisotropic, restores every 90 Refractive index: Np: 1. 690 to 1700 Nm: 1. 693 to 1. 698 Ng: 1. 698 to 1. 706 Birefringence: 0. 008 to 0. 013
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