mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple color, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, purple color, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins, gas cavities in volcanic rocks (geodes), and pegmatites through the presence of trace iron and natural irradiation.
Uses & applications
Widely used in high-end and commercial jewelry, ornamental carvings, and treasured by mineral collectors.
Geological facts
Ancient Greeks believed amethyst prevented intoxication, deriving its name from the Greek word 'amethystos', meaning not intoxicated.
Field identification & locations
Identify by its distinct purple coloration and hexagonal crystal habit; commonly sourced from Brazil, Uruguay, Zambia, and the USA.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous