sedimentary
Tumbled Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline quartz structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline quartz structure with conchoidal fracture.
Formation & geological history
Formed in cavities of volcanic and metamorphic rocks through the deposition of silica-rich groundwater over millions of years.
Uses & applications
Widely used in jewelry, decorative carvings, metaphysical practices, and lapidary art.
Geological facts
Agate has been used by humans for ornamentation and amulets since Neolithic times, notably in ancient Greece and Egypt.
Field identification & locations
Identified by its distinctive concentric banding and translucency; commonly found worldwide in volcanic host rocks.
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