sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors including red and brown, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors including red and brown, and conchoidal fracture.
Formation & geological history
Formed through the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often over millions of years.
Uses & applications
Commonly used in ornamental carvings, cabochons, jewelry, and as a collectible lapidary material.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its durability.
Field identification & locations
Identify it by its smooth waxy feel, opaque appearance, and lack of crystal cleavage; found worldwide in riverbeds and mountainous regions.
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Sandstone or Siltstone
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Sandstone
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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