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Clivage: Parfait
ne rétablit pas)
Possible color: White background with blue
- Lapis lazuli
Perles en cristal de roche facettées entre 2 et 4mm Sizes:2mm Clivage: ParfaitFaceted rock crystal beads. Color: Colorless (more or less inclusive) Sizes between 2 and 4mm Country of origin: Brazil Gemological information on rock crystal: Possible color: Colorless, may be heavily included which gives it a whitish appearance Density: 2. 65 Hardness: 7 Crystal system: Trigonal Fracture: Conchoidal, irregular Cleavage: None Polariscope: Anisotropic, restores every 90 Refractive index: No: 1. 539 to 1. 550 Ne: 1. 549 to 1. 557
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