mineral
Tumbled Amethyst
Silicon Dioxide (SiO2)
Hardness: 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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