VENDU Tourmaline Noire 7 Goutte facettée Informations gemmologiques sur le jaspe

Informations gemmologiques sur le jaspe Noreena:

Possible color: Orange to red

Pentamorphic (with Tridymite)

The chips shape is the result of small fragments of blue lace agate that are then polished so as not to have any loss

accompagné de blanc

VENDU Tourmaline Noire 7 Goutte facettée Informations gemmologiques sur le jaspeBlack tourmaline cabochon. Black Shape: Drop Size: 39. 69 x 33. 29mm Weight in grams: 20. 27g Carat weight: 101. 35 carat Country of origin: Madagascar Gemological information about tourmaline: Density: Between 2. 84 and 3. 40 Hardness: Between 7 and 7. 5 Crystal system: Trigonal Fracture: Subconchoidal to irregular Cleavage: None Polariscope: Anisotropic (restores all 90 except in the optical axis) Refractive index: Ne: 1. 603 to 1. 772 No: 1. 619 to