mineral
Agate
Silicon Dioxide (Quartz), SiO2
AI-generated identification · may be incorrectHardness: 6.5-7 on the Mohs scale, Color: Various shades of brown, white, and translucent, Luster: Vitreous to waxy, Crystal structure: Trigonal (microcrystalline quartz/chalcedony), Cleavage: None
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 on the Mohs scale, Color: Various shades of brown, white, and translucent, Luster: Vitreous to waxy, Crystal structure: Trigonal (microcrystalline quartz/chalcedony), Cleavage: None
Formation & geological history
Formed by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks, often occurring over millions of years.
Uses & applications
Used primarily in jewelry, decorative items, ornamental carvings, and lapidary art.
Geological facts
Agates are often found in ancient volcanic lava flows where gas bubbles once formed cavities that later filled with silica-rich water.
Field identification & locations
Can be identified in the field by its waxy luster, microcrystalline structure, and characteristic banding or translucency. Found worldwide, especially in Brazil, India, Madagascar, and the US.
