gemstone
Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, and exhibits concentric or irregular banding in various colors.
Identified More gemstone →
Explore Agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, and exhibits concentric or irregular banding in various colors.
Formation & geological history
Forms by the deposition of silica from groundwater in the cavities of igneous or sedimentary rocks over millions of years.
Uses & applications
Widely used in jewelry, decorative ornaments, and precision instruments like mortars and pestles.
Geological facts
Agate was highly valued in antiquity as a talisman and for making intricately carved cameos.
Field identification & locations
Easily identified by its distinctive multicolored bands and conchoidal fracture; commonly found globally in volcanic rock cavities.
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
Topaz
Al2SiO4(F,OH)2
mineral
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary