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Informations gemmologiques sur l'obsidienne oeil céleste:
- Sunflower quartz
- Purple scapolite
- White chalcedony
Perles en améthyste entre 4 et 12mm AS améthyste lila Informations gemmologiques sur l'obsidienne oeilAmethyst beads. Color: Lavender Sizes: Between 4 and 12mm Country of origin: Brazil 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 Filter: Inert to
