sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7, vitreous to dull luster, opaque appearance, and conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7, vitreous to dull luster, opaque appearance, and conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, often via silica-rich hydrothermal fluids.
Uses & applications
Widely used for ornamental carvings, polished cabochons, jewelry, and decorative stone objects.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components across various civilizations.
Field identification & locations
Found worldwide in riverbeds and ancient mineral deposits; identified by its smooth, waxy luster and opaque, multicolored banding.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
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Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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