sedimentary
Jasper
Microcrystalline quartz, SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, typically green, brown, or red with a waxy luster and opaque transparency.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, typically green, brown, or red with a waxy luster and opaque transparency.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, precipitated from silica-rich solutions in marine or hydrothermal environments.
Uses & applications
Used primarily for ornamental carvings, cabochons, lapidary art, and geological specimen collecting.
Geological facts
Jasper has been used since ancient times for talismans, seals, and jewelry, notably by ancient Minoans and Egyptians.
Field identification & locations
Identify by its opaque nature, conchoidal fracture, high hardness, and distinctive vein inclusions. Commonly found in riverbeds and mountainous regions worldwide.
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