sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, exhibiting various earth tones with a waxy to dull luster and a cryptocrystalline structure.
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Physical properties
Mohs hardness of 6.5 to 7, exhibiting various earth tones with a waxy to dull luster and a cryptocrystalline structure.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, often precipitating from silica-rich solutions in marine or hydrothermal environments.
Uses & applications
Commonly used for ornamental carvings, cabochons, jewelry, and as a collector specimen.
Geological facts
Jasper has been used since antiquity for talismans, seals, and weaponry due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its opaque nature and conchoidal fracture, frequently found in riverbeds and ancient alluvial deposits worldwide.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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