sedimentary
Leopardskin Agate
Silicon dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and distinctive orbicular or spotted patterns in brown, grey, and black.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline structure, and distinctive orbicular or spotted patterns in brown, grey, and black.
Formation & geological history
Formed through the deposition of silica-rich groundwater in cavities of volcanic and sedimentary rocks over millions of years.
Uses & applications
Widely used in ornamental jewelry, polished tumbled stones, and lapidary art.
Geological facts
Agate varieties have been prized since antiquity for amulets and decorative objects, with patterns formed by rhythmic precipitation of minerals.
Field identification & locations
Identified by its conchoidal fracture, high hardness scratching glass, and unique spotted orbicular inclusions. Commonly found in Mexico and Brazil.
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