sedimentary
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, opaque, and microcrystalline crystal structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, opaque, and microcrystalline crystal structure with conchoidal fracture.
Formation & geological history
Forms from the accumulation of silica-rich sediments or silica-bearing hydrothermal solutions, often in marine or volcanic environments.
Uses & applications
Used primarily for ornamental carvings, polished cabochons in jewelry, and decorative lapidary items.
Geological facts
Jasper has been used since ancient times for seals, talismans, and decorative items due to its durability and rich earth tones.
Field identification & locations
Identified by its opacity, microcrystalline texture, and distinct earthy color banding or patterns; common in riverbeds and gravel deposits worldwide.
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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