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Indice de réfraction: Np: 1
Système cristallin: Rhomboédrique
the stone of which will fall as close as possible to the solar plexus and the heart
A savoir: Aussi appelé irise ou irisé
Perles en améthyste, forme diamant entre 6 et 10mm Carré Indice de réfraction: Np: 1Amethyst beads, diamond shape. Color: More or less light purple. Sizes between 6 and 10mm Country of origin: Brazil Gemological information about amethyst: Possible color: Blue mauve, purple, dark magenta, purple magenta 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 1. 553 Birefringence:
