sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque brownish-red color, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque brownish-red color, and conchoidal fracture.
Formation & geological history
Formed through the precipitation of silica-rich fluids in sedimentary or volcanic environments, often during ancient marine or hydrothermal events.
Uses & applications
Commonly used for ornamental carvings, polished cabochons, jewelry, and lapidary art.
Geological facts
Jasper has been utilized by humans for thousands of years to create tools, seals, and decorative items.
Field identification & locations
Identify by its lack of cleavage, high hardness, waxy luster, and opaque earthy tones; frequently found in riverbeds and pebble beaches worldwide.
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Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
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Sandstone
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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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