mineral

Amethyst (Geode/Druzy)

Silicon Dioxide (SiO2) with iron impurities

Hardness: 7 on Mohs scale; Color: light to deep purple; Luster: vitreous (glassy); Crystal Structure: hexagonal (trigonal); Cleavage: none (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: light to deep purple
Luster: vitreous (glassy)

Identified April 7, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: light to deep purple; Luster: vitreous (glassy); Crystal Structure: hexagonal (trigonal); Cleavage: none (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in hollow cavities (geodes) within volcanic or sedimentary rock through hydrothermal precipitation as silica-rich fluids cool and crystallize over millions of years.

Uses & applications

Widely used in jewelry (faceting, beads, cabochons), home decor, and a staple in mineral collecting and metaphysical practices.

Geological facts

Amethyst is the birthstone for February. The purple color is caused by the irradiation of iron inclusions within the quartz. Legend says the name comes from the Greek word 'amethystos', meaning 'not intoxicated', as it was believed to prevent drunkenness.

Field identification & locations

Identify by its characteristic purple terminal crystal points protruding from a rocky rind. Found commonly in Brazil, Uruguay, and Thunder Bay, Canada. Collectors should look for vibrant color saturation and crystal clarity.

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