gemstone

Amethyst Cluster Pendant

Silicon Dioxide (SiO2) - Quartz variety Amethyst

Hardness of 7 on the Mohs scale, purple to violet color due to iron impurities and natural irradiation, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Identified August 3, 2026More gemstone →

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Physical properties

Hardness of 7 on the Mohs scale, purple to violet color due to iron impurities and natural irradiation, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Formation & geological history

Formed within gas cavities (vesicles) in basaltic or other volcanic rocks, or within hydrothermal veins, where silica-rich solutions cool and precipitate quartz crystals over millions of years.

Uses & applications

Used in jewelry, decorative items, and crystal healing.

Geological facts

Amethyst was once considered one of the cardinal gemstones of high value until large deposits were discovered in Brazil. Its purple color historically associated it with royalty.

Field identification & locations

Easily identified by its distinct purple coloration, crystal points, and quartz hardness. Frequently found in Brazil, Uruguay, and various localities in the United States.

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N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ

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