sedimentary
Red Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, opaque reddish-brown color due to iron inclusions, waxy to vitreous luster, and conchoidal fracture with no cleavage.
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Physical properties
Mohs hardness of 6.5 to 7, opaque reddish-brown color due to iron inclusions, waxy to vitreous luster, and conchoidal fracture with no cleavage.
Formation & geological history
Forms through the thermal alteration or silica-rich precipitation in marine environments, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Widely used in ornamental carvings, cabochons, jewelry, and lapidary art.
Geological facts
Red jasper has been used since ancient times for amulets and seals, prized by civilizations like the ancient Egyptians.
Field identification & locations
Identified by its rich red color, opaque appearance, and hard, smooth conchoidal breakage; commonly found globally in hydrothermal veins and sedimentary deposits.
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