sedimentary
Eyed Agate
Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy luster, microcrystalline quartz structure, displays concentric circular banding resembling eyes.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy luster, microcrystalline quartz structure, displays concentric circular banding resembling eyes.
Formation & geological history
Formed in cavities of volcanic and sedimentary rocks through the rhythmic deposition of silica-rich groundwater over millions of years.
Uses & applications
Used primarily in lapidary arts, tumbled stones, ornamental carvings, and jewelry making.
Geological facts
Ancient civilizations prized eyed agates as protective amulets capable of warding off the evil eye.
Field identification & locations
Identify by distinct concentric rings and waxy luster; commonly found worldwide in riverbeds and volcanic regions.
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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