mineral
Agate
Agate (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Translucent tan to light brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58–2.64
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Translucent tan to light brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58–2.64
Formation & geological history
Formed as a secondary mineral in host rock cavities through the deposition of silica from groundwater; commonly found in volcanic and certain metamorphic rocks.
Uses & applications
Used in jewelry (cabochons, beads), decorative objects, precision pendulums, and industrial applications like mortar and pestles due to its hardness.
Geological facts
Agate is a variety of chalcedony. The name comes from the Achetes River in Sicily, where agates were first discovered in ancient times.
Field identification & locations
Identify by its waxy luster, translucency, and smoothness after being water-worn or tumbled. Common in riverbeds and beaches in volcanic regions.
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Granite
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Septarian Pebble
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