Perles en cristal de roche facettées entre 2 et 4mm blanc - Brings determination

- Brings determination

forme diamant

Informations gemmologiques sur la howlite:

Different countries where fluorite may be mined: South Africa

Perles en cristal de roche facettées entre 2 et 4mm blanc - Brings determinationFaceted 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