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- Péristerite
Cleavage: Easy
gray to colorless purple
Nombre de perles sur un rang de 4mm: Entre 94 et 95 perles
Gemological information on rock crystal:
Perles en améthyste entre 4 et 10mm AC Donuts / disque / heichi - PéristeriteAmethyst beads. Color: Light to dark purple. Sizes: Between 4 and 10mm Country of origin: Uruguay 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 Birefringence: 0. 009 Chelsea
