sedimentary
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron oxide inclusions, waxy to dull luster, cryptocrystalline structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron oxide inclusions, waxy to dull luster, cryptocrystalline structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
Formation & geological history
Forms via the precipitation of silica-rich solutions in sedimentary environments or hydrothermal veins, often accumulating in ocean basins as part of banded iron formations dating back billions of years.
Uses & applications
Commonly used for making ornamental objects, carvings, cabochons, polished stones, and jewelry.
Geological facts
Red jasper has been used since ancient times for amulets, seals, and weaponry. It is mentioned in various historical texts and was often valued for its purported protective and grounding spiritual properties.
Field identification & locations
Can be identified in the field by its opaque red color, smooth waxy texture when weathered, and hardness that easily scratches glass. Found worldwide, particularly in river beds, beaches, and areas with ancient marine deposits.
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