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Properties for Stone: Amethyst
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Muscular-Cramps
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Cyanotrichite stick Properties for Stone: AmethystGrandview Mine Coconino Co Arizona Physical and optical properties at a glance Chemical formula CuAl(SO)(OH)2HO Crystal system Orthorhombic Crystal habit Acicular, radial, tufted, velvety Color Sky blue to azure blue Streak Pale blue Luster Silky Mohs hardness 13 (can be scratched by a fingernail) Specific gravity 2. 742. 95 Refractive indices n = 1. 5881. 591; n = 1. 6171. 620; n = 1. 6541. 655 Diaphaneity Transparent to translucent Cleavage Good in
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