gemstone
Blue Agate
Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, blue and white banding colors, waxy to vitreous luster, and cryptocrystalline structure.
Identified More gemstone →
Explore Blue 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, blue and white banding colors, waxy to vitreous luster, and cryptocrystalline structure.
Formation & geological history
Forms by the deposition of silica from groundwater in cavities of igneous and sedimentary rocks over millions of years.
Uses & applications
Widely used in making jewelry, ornamental carvings, polished display specimens, and metaphysical practices.
Geological facts
Agates are often associated with ancient talismans and have been used for decorative purposes since the Neolithic period.
Field identification & locations
Identified by its distinctive concentric bands and conchoidal fracture; commonly found in volcanic rock cavities worldwide.
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
Pearl necklace
Pearl, primarily aragonite (CaCO₃) and conchiolin
gemstone