Perles en angelite facettées facette Informations gemmologiques sur l'obsidienne oeil

Informations gemmologiques sur l'obsidienne oeil céleste:

Tailles entre 4 et 12mm

- Glass doublet

009 Chelsea Filter: Inert to reddish Spectrum: Not observable / not diagnostic Different countries where amethyst may be mined: Bolivia

Perles en angelite facettées facette Informations gemmologiques sur l'obsidienne oeilFaceted angelite beads. Color: Blue Size: 4 x 6mm Country of origin: Peru Gemological information about angelite: Possible color: Colorless, white, blue, bluish, red magenta, magenta to purple Real name: Anhydrite Density: between 2. 90 and 3 Hardness: between 3 and 4 Crystal system: Orthorhombic Breakage: Uneven Cleavage: Perfect Polariscope: Anisotropic, restores every 90 Refractive index: Np: 1. 570 Nm: 1. 575 to 1. 576 Ng: 1. 614 Birefringence: 0.