gemstone
Amethyst Quartz Pendant
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale; color ranges from pale lavender to deep purple; vitreous (glass-like) luster; trigonal crystal system; no true cleavage; specific gravity of 2.65.
Identified More gemstone →
Explore Amethyst Quartz Pendant in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale; color ranges from pale lavender to deep purple; vitreous (glass-like) luster; trigonal crystal system; no true cleavage; specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins and gas cavities (vugs) in volcanic rocks, where silica-rich solutions cool and crystallize over long geological timescales.
Uses & applications
Widely used in jewelry as cut or polished gemstones, lapidary arts, decorative items, and by collectors or spiritual practitioners.
Geological facts
Amethyst is the purple variety of quartz. Its distinct violet color is caused by irradiation, iron impurities, and the presence of trace elements.
Field identification & locations
Identified by its purple color and characteristic quartz hardness. Commonly found worldwide, notably in Brazil, Uruguay, Zambia, and the USA.
More like this
Other gemstone specimens
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Black Opal Ring (Carved Opal)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone