sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, reddish-brown color due to iron oxide impurities, opaque transparency, waxy to dull luster, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, reddish-brown color due to iron oxide impurities, opaque transparency, waxy to dull luster, and conchoidal fracture.
Formation & geological history
Formed through the deposition of silica-rich fluids in sedimentary environments or hydrothermal veins, often associated with ancient marine deposits and volcanic activity over millions of years.
Uses & applications
Commonly used in ornamental carvings, cabochons, polished stones, jewelry making, and lapidary art.
Geological facts
Jasper has been used since ancient times for talismans, seals, and tools, with some varieties mentioned in ancient texts dating back thousands of years.
Field identification & locations
Can be identified in the field by its distinct red-brown coloration, hardness capable of scratching glass, and smooth, waxy fracture surface. Found worldwide in riverbeds, mountainous regions, and ancient sedimentary formations.
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