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Indice de réfraction: No: 1
Different countries where tourmaline can be mined: Brazil
it is composed largely of yellow calcite
Crystal system: Trigonal / Microcrystalline
VENDU Amétrine 7 Facettées Indice de réfraction: No: 1Ametrine cabochon. Color: Purple and yellow Shape: Drop Size: 26. 13 x 22. 17mm Weight in grams: 7. 49g Carat weight: 37. 49 carat Country of origin: Bolivia Gemological information about ametrine: Possible color: Purple with yellow to orange Density: 2. 65 Hardness: 7 Crystal system: Trigonal Fracture: Conchoidal Cleavage: None Polariscope: Anisotropic (restores all 90, except in the optical axis) Refractive index: n0: 1. 538 to 1. 544 ne: 1. 547 to
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