sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color with dark inclusions, waxy to vitreous luster, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color with dark inclusions, waxy to vitreous luster, and conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary deposits or volcanic ash, often precipitating from silica-rich hydrothermal fluids in marine environments.
Uses & applications
Widely used for tumbled stones, cabochons in jewelry, small ornamental carvings, and lapidary art.
Geological facts
Red jasper has been utilized since ancient times for amulets, seals, and weaponry components by various civilizations including the ancient Egyptians.
Field identification & locations
Identified by its distinctive deep red color, high hardness that scratches glass, and smooth waxy feel when polished; commonly found in riverbeds and mountainous regions worldwide.
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