mineral
Tumbled Amethyst
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Purple to violet; Luster: Vitreous; Crystal System: Trigonal; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Purple to violet
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: Purple to violet; Luster: Vitreous; Crystal System: Trigonal; Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins and gas cavities (vesicles) of volcanic rocks through the deposition of silica-rich solutions over millions of years.
Uses & applications
Used widely in crystal healing, jewelry, decorative ornaments, and gemstone collecting.
Geological facts
Amethyst was once considered as valuable as a diamond until extensive deposits were found in Brazil during the 19th century. Its purple color comes from irradiation and trace amounts of iron.
Field identification & locations
Easily identified by its distinct purple coloration and hardness (scratches glass). Found globally, with major deposits in Brazil, Uruguay, Zambia, and the USA.
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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
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous