Perles en iolite facettées arbre de vie terracotta color

terracotta color

Gemological information on charoite:

Différents pays ou peut-être extraite la iolite: Brésil

diamond shape

Perles en iolite facettées arbre de vie terracotta colorFaceted iolite beads. Color: Dark blue Size: 3 x 4mm Country of origin: Brazil Gemological information about iolite: Possible color: Light to dark blue, gray to colorless purple Real name: Cordierite Density: Between 2. 57 and 2. 66 Hardness: 7. 5 Crystal system: Orthorhombic Fracture: Conchoidal Cleavage: Indistinct Polariscope: Anisotropic Refractive index: Np: 1. 530 to 1. 533 Nm: 1. 535 to 1. 561 Ng: 1. 538 to 1. 563 Birefringence: 0. 006 to 0.