mineral
Amethyst
Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple color, vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, purple color, vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins and gas cavities within volcanic rocks when silica-rich fluids cool with trace iron impurities.
Uses & applications
Widely used in fine jewelry, ornamental carvings, and holistic crystal collections.
Geological facts
Its purple color is caused by natural irradiation of iron impurities substituting for silicon in the quartz lattice.
Field identification & locations
Identified easily by its distinctive purple hue and conchoidal fracture; found globally with major deposits in Brazil, Uruguay, and Zambia.
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Other mineral specimens
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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
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Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous