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38 carat Country of origin: Tanzania Treatment: Contains colorless oil residue that is present in small fractures of the stone
A savoir: C'est le nom générique d'un minerai de nickel vert qui s'est formé à la suite de l'altération latéritique de roches ultramafiques (serpentinite
Carat weight: 13
12 carat Country of origin: Congo Gemological information about malachite: Possible color: Light green to dark green with zoning Density: Between 3
The chemical composition of most peridots is often very close to forsterite
Perles en chrysoprase entre 4 et 10mm Carré / cube 38 carat Country of origin:Chrysoprase beads Color: Green Sizes between 4 and 10mm Country of origin: Australia Gemological information on chrysoprase: Possible color: Apple green to light green Density: Between 2. 57 and 2. 64 Hardness: 6 Crystal system: Trigonal Microcrystalline Fracture: Conchoidal; splintery, irregular Cleavage: None Polariscope: Anisotropic Refractive index: From 1. 53 to 1. 55 ne: 1. 539 to 1. 545 n0: 1. 526 to 1. 535 Birefringence: +0. 004 to +0. 009
