sedimentary
Red Jasper
Microcrystalline Quartz (SiO2) with iron oxide inclusions
Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron impurities, opaque transparency, waxy to vitreous luster, trigonal crystal system with microcrystalline structure, and uneven or conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron impurities, opaque transparency, waxy to vitreous luster, trigonal crystal system with microcrystalline structure, and uneven or conchoidal fracture.
Formation & geological history
Formed through the deposition of silica-rich fluids in sedimentary environments or hydrothermal veins, often associated with ancient marine environments. Geological age can range from Precambrian to Cenozoic.
Uses & applications
Commonly used in lapidary work, decorative carvings, cabochons, tumbled stones, jewelry making, and metaphysical practices.
Geological facts
Jasper has been used since ancient times to create seals, talismans, and jewelry. The red variety was particularly prized by ancient Egyptians, who associated it with the blood of the goddess Isis.
Field identification & locations
Easily identified by its deep red color, opaque nature, hardness (scratches glass), and smooth waxy feel when polished. Found worldwide, with notable deposits in India, Russia, Brazil, and the USA.
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