Perles en améthyste entre 4 et 12mm AS quartz rutile They are subjected to a

They are subjected to a high temperature such that they undergo the beginning of vitrification

529 / Nm: 1

Indice de réfraction: n0: 1

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Tailles: Entre 2 et 6

Perles en améthyste entre 4 et 12mm AS quartz rutile They are subjected to aAmethyst beads. Color: Lavender Sizes: Between 4 and 12mm 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: 0. 009 Chelsea Filter: Inert to