mineral
Amethyst and Titanium Treated Druzy
Silicon Dioxide (SiO2) with trace impurities including Iron
Hardness: 7 on Mohs scale; Color: Purple and iridescent gold/pink; Luster: Vitreous; Crystal Structure: Hexagonal/Trigonal; Cleavage: None
- Hardness
- 7 on Mohs scale
- Color
- Purple and iridescent gold/pink
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: Purple and iridescent gold/pink; Luster: Vitreous; Crystal Structure: Hexagonal/Trigonal; Cleavage: None
Formation & geological history
Formed in hydrothermal veins and geodes from volcanic silica-rich solutions. Amethyst obtains its color from irradiation and iron impurities. The druzy specimen shown has been industrially coated with titanium or gold vapor.
Uses & applications
Used in gemstone jewelry, ornamental carvings, and widely collected as mineral specimens for aesthetic and metaphysical purposes.
Geological facts
Amethyst was considered a precious stone comparable to diamond until large deposits were discovered in Brazil in the 1700s. The name comes from the Greek 'amethystos', meaning 'not intoxicated'.
Field identification & locations
Identify by the purple color variations and six-sided crystal habits. Amethyst is found globally, with major deposits in Brazil, Uruguay, and Zambia. Druzy is recognized by the carpet of tiny sparkling crystals.
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