sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors including red, brown, green, yellow, and patterned, conchoidal fracture with no cleavage, specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various colors including red, brown, green, yellow, and patterned, conchoidal fracture with no cleavage, specific gravity of 2.58 to 2.91.
Formation & geological history
Forms from the precipitation of silica-rich fluids in sedimentary environments, often involving ancient marine or volcanic processes over millions of years.
Uses & applications
Used in ornamental carvings, jewelry, lapidary art, and as a collector specimen.
Geological facts
Jasper has been used by ancient civilizations since the 4th millennium BC for making seals, drills, and jewelry.
Field identification & locations
Can be identified by its opaque appearance, waxy luster, and wide range of colorful natural patterns. Found globally in riverbeds, mountainous regions, and sedimentary deposits.
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