mineral
Amethyst Quartz fragment
SiO2 (Silicon Dioxide with Iron impurities)
Hardness: 7 on Mohs scale; Color: Purple, violet to grayish-transparent; Luster: Vitreous; Crystal system: Hexagonal; Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Purple, violet to grayish-transparent
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: Purple, violet to grayish-transparent; Luster: Vitreous; Crystal system: Hexagonal; Specific gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or geodes within volcanic or metamorphic rocks when silica-rich water deposits crystals. The purple color comes from irradiation and iron impurities.
Uses & applications
Commonly used in jewelry, as decorative stones, or for crystal healing practices.
Geological facts
Amethyst was highly valued in the ancient world and was once considered as precious as diamonds until large deposits were found in Brazil.
Field identification & locations
Identify by its purple hue and glass-like luster. It will scratch a steel nail or glass. Commonly found in Brazil, Uruguay, and Africa.
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