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- Tourmaline noire
Country of origin: Philippine
- Would help fight osteoporosis
83g Carat weight: 74
Perles en améthyste, forme coeur blanche - Tourmaline noireAmethyst beads, heart shape. Color: Light to dark purple. Size: 8 x 4mm Country of origin: Brazil Number of hearts in a row: 53 Gemological information about amethyst: Possible color: Blue mauve, purple, dark magenta, purple magenta Density: 2. 65 Hardness: 7 Crystal system: Trigonal Fracture: Conchoidal Cleavage: None Polariscope: Anisotropic (restores all 90, except in the optical axis) Refractive index: n0: 1. 538 to 1. 544 ne: 1. 547 to 1. 553
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