mineral
Eye Agate
Band Chalcedony (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 on the Mohs scale. Color: Brownish-yellow core surrounded by white, gray, and dark concentric bands. Luster: Vitreous to waxy. Structure: Microcrystalline aggregate. Cleavage: None, exhibits conchoidal fracture.
- Hardness
- 6
- Luster
- Vitreous to waxy
Identified More mineral →
Explore Eye 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 the Mohs scale. Color: Brownish-yellow core surrounded by white, gray, and dark concentric bands. Luster: Vitreous to waxy. Structure: Microcrystalline aggregate. Cleavage: None, exhibits conchoidal fracture.
Formation & geological history
Formed in cavities within volcanic or metamorphic rocks when silica-rich fluid precipitates in layers over time, creating concentric ring or 'eye' patterns.
Uses & applications
Used in lapidary work, jewelry (cabochons, beads, rings), talismanic carvings, and as a popular collectible gemstone.
Geological facts
Concentric rings in agates are often called 'eyes' and have been revered for thousands of years as protective amulets against the 'evil eye' in many ancient cultures.
Field identification & locations
Identified by its distinctive concentric, circular banding pattern and translucent to opaque silica body. Common in volcanic regions such as Brazil, Madagascar, India, and the Lake Superior region of North America.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary