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conchoïdale
- Variscite
In particular
hackmanite: colorless
Polariscope: Anisotropic (does not restore if opaque)
Perles en améthyste lavande entre 2 et 14mm ALD Sizes:6mm conchoïdaleLavender amethyst beads included. Color: Lavender Sizes: Between 2 and 14mm 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
