sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, earthy to vitreous luster, opaque green and reddish-brown coloration, conchoidal fracture, and specific gravity of 2.58 to 2.91.
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Physical properties
Mohs hardness of 6.5 to 7, earthy to vitreous luster, opaque green and reddish-brown coloration, conchoidal fracture, and specific gravity of 2.58 to 2.91.
Formation & geological history
Formed via silica-rich hydrothermal fluids or chemical precipitation within sedimentary and volcanic environments, often occurring in ancient marine deposits.
Uses & applications
Utilized widely in ornamental carving, cabochons, lapidary arts, and decorative aggregate.
Geological facts
Jasper has been used since antiquity for talismans, seals, and weaponry components by ancient civilizations worldwide.
Field identification & locations
Easily identified by its opaque nature, high hardness, and variegated color patterns; common globally in river gravels and desert varnish terrains.
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Sandstone or Siltstone
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Shale
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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