Perles en cristal de roche facettées entre 2 et 4mm blanc Informations gemmologiques sur la howlite:

Informations gemmologiques sur la howlite:

They are subjected to a high temperature such that they undergo the beginning of vitrification

Color: Green and some black

general well-being

Perles en cristal de roche facettées entre 2 et 4mm blanc Informations gemmologiques sur la howlite:Faceted 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