sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors including red, brown, green, and yellow, with a cryptocrystalline structure and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors including red, brown, green, and yellow, with a cryptocrystalline structure and conchoidal fracture.
Formation & geological history
Formed through the deposition of silica-rich fluids or sediments in marine or terrestrial environments, often originating from hydrothermal activity or chemical precipitation.
Uses & applications
Used in ornamental carvings, jewelry, lapidary art, and as a decorative stone.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and jewelry, and is mentioned in various historical texts.
Field identification & locations
Identified by its opaque nature, waxy to dull luster, conchoidal fracture, and hardness, commonly found in riverbeds and mountainous regions worldwide.
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