sedimentary
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Hardness of 6.5 to 7 on the Mohs scale, opaque reddish-brown color due to iron inclusions, vitreous to dull luster, microcrystalline structure, and no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque reddish-brown color due to iron inclusions, vitreous to dull luster, microcrystalline structure, and no cleavage.
Formation & geological history
Formed when fine particulate materials such as silica-rich fluids permeate volcanic ash or sedimentary rocks under heat and pressure, integrating hematite/iron oxide which gives the distinctive red color.
Uses & applications
Commonly shaped and polished into beads, cabochons, carved ornaments, and used extensively in jewelry making and gemstone collecting.
Geological facts
Red Jasper has been used since antiquity in amulets and seals. It is known historically as a stone of endurance and protection.
Field identification & locations
Identified by its rich deep red to brownish-red opaque color and smooth polish. Commonly found in India, Russia, Madagascar, South Africa, and the southwestern United States.
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