sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, various colors including red, brown, yellow, and green, waxy to dull luster, cryptocrystalline structure, conchoidal fracture, and specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, various colors including red, brown, yellow, and green, waxy to dull luster, cryptocrystalline structure, conchoidal fracture, and specific gravity of 2.58 to 2.91.
Formation & geological history
Formed through the deposition of silica-rich fluids in sedimentary basins or volcanic environments, often replacing organic material or filling fractures over millions of years.
Uses & applications
Used widely in ornamental carvings, cabochons, jewelry, and as a collector's specimen.
Geological facts
Jasper has been used by ancient civilizations for thousands of years to create tools, seals, and decorative items due to its durability and rich colors.
Field identification & locations
Can be identified in the field by its hardness, opacity, conchoidal fracture, and characteristic earthy or patterned coloration. Commonly found in riverbeds and mountainous regions worldwide.
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