gemstone
Tumbled purple stone, likely amethyst
Amethyst, violet quartz (SiO₂); identification from the image is tentative
AI-generated identification · may be incorrectPurple, opaque-to-translucent, polished and rounded; quartz has Mohs hardness 7, vitreous luster, and a trigonal crystal structure, with no cleavage and conchoidal fracture.
Identified More gemstone →
Explore Tumbled purple stone, likely amethyst in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Purple, opaque-to-translucent, polished and rounded; quartz has Mohs hardness 7, vitreous luster, and a trigonal crystal structure, with no cleavage and conchoidal fracture.
Formation & geological history
Amethyst forms as trace iron colors quartz crystals, commonly in volcanic-rock cavities; deposits range from geologically recent to hundreds of millions of years old.
Uses & applications
Used in jewelry, decorative objects, and mineral collections; tumbling improves its smooth finish.
Geological facts
Amethyst’s violet color is associated with iron impurities and natural radiation exposure.
Field identification & locations
Common sources include Brazil, Uruguay, and Zambia. Check for quartz-like hardness and natural color zoning; the image alone cannot confirm the identification.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone