mineral

Amethyst (Scepter/Double Terminated Point)

Silicon Dioxide (SiO2)

Hardness: 7; Color: Deep purple to lavender; Luster: Vitreous (glassy); Crystal Structure: Hexagonal/Trigonal (rhombohedral); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7
Color: Deep purple to lavender
Luster: Vitreous (glassy)

Identified June 13, 2026More mineral →

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Physical properties

Hardness: 7; Color: Deep purple to lavender; Luster: Vitreous (glassy); Crystal Structure: Hexagonal/Trigonal (rhombohedral); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or volcanic cavities (geodes). The purple color comes from irradiation of trivalent iron (Fe3+) impurities within the quartz lattice.

Uses & applications

Primarily used in jewelry, as a healing stone in metaphysical practices, and as a popular collectible for mineral enthusiasts.

Geological facts

Until the 18th century, amethyst was included in the cardinal (most valuable) gemstones along with diamond, ruby, sapphire, and emerald. Large deposits found in Brazil lowered its market value significantly.

Field identification & locations

Identify by its characteristic purple hue, hexagonal habit, and hardness (it can scratch glass). Commonly found in Brazil, Uruguay, and through rock-hounding in parts of Arizona and Ontario.

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Mineral/Rock

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Metamorphic Rock

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