sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, colors vary widely including red, brown, yellow, green, and black, waxy to dull luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58-2.91.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, colors vary widely including red, brown, yellow, green, and black, waxy to dull luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58-2.91.
Formation & geological history
Formed through the deposition of silica-rich fluids in sedimentary basins or volcanic environments, often during the precipitation of silica in ocean waters, dating across various geological eras.
Uses & applications
Used for ornamental objects, carved figurines, cabochons in jewelry, and collected as lapidary specimens.
Geological facts
Jasper has been used since ancient times for talismans, seals, and jewelry, with mentions dating back to antiquity across various civilizations.
Field identification & locations
Identified by its opaque nature, smooth conchoidal fracture, and varied colorful patterns. Commonly found worldwide in riverbeds, ancient marine deposits, and volcanic regions.
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