sedimentary
Agate Breccia
Brecciated Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, vitreous to waxy luster, conchoidal fracture, and multicolored angular fragments cemented together.
Identified More sedimentary →
Explore Agate Breccia 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, vitreous to waxy luster, conchoidal fracture, and multicolored angular fragments cemented together.
Formation & geological history
Formed by tectonic fracturing or collapse of rock followed by hydrothermal silica-rich groundwater cementing the fragments.
Uses & applications
Used primarily in lapidary arts, decorative slabs, cabochons, and by mineral collectors.
Geological facts
Brecciated agates record ancient seismic and volcanic fracturing events preserved in microcrystalline quartz.
Field identification & locations
Identified by angular banded quartz fragments in a contrasting matrix; found globally in volcanic regions.
More like this
Other sedimentary specimens
Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary