Mineral
Agate
Chalcedony (Microcrystalline Quartz) - SiO2
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale, waxy luster, translucent to opaque. This specimen is polished and shows typical banding.
Identified More mineral →
Explore Agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6.5-7 on Mohs scale, waxy luster, translucent to opaque. This specimen is polished and shows typical banding.
Formation & geological history
Forms in cavities of volcanic rocks or ancient lavas, deposited by silica-rich waters over long periods of time.
Uses & applications
Commonly used in jewelry, decorative items, and lapidary arts. Often cut and polished into cabochons or hearts.
Geological facts
Agate is a variety of chalcedony characterized by its fineness of grain and brightness of color. It is named after the Achates River in Sicily where it was discovered.
Field identification & locations
Identified by its waxy luster and often banded appearance. Found worldwide, with notable deposits in Brazil, Uruguay, and the USA.
