sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Colors range from red and brown to yellow, with a vitreous to dull luster. It has a microcrystalline structure with conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7. Colors range from red and brown to yellow, with a vitreous to dull luster. It has a microcrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the precipitation of silica-rich fluids within sedimentary environments or volcanic ash deposits, often dating back millions of years.
Uses & applications
Widely used in ornamental carvings, cabochons, jewelry, and as a collector mineral.
Geological facts
Jasper has been used since ancient times for talismans and weaponry. Ancient civilizations carved seals and signet rings from various types of jasper.
Field identification & locations
Identify by its opacity, hardness, and smooth waxy polish. Commonly found in riverbeds, hydrothermal veins, and sedimentary rock formations worldwide.
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Sandstone or Siltstone
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Sandstone
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Shale
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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