sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque green to yellow color, waxy to vitreous luster, and a conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque green to yellow color, waxy to vitreous luster, and a conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, where silica-rich fluids replace original material over millions of years.
Uses & applications
Widely used in lapidary arts for making cabochons, beads, decorative carvings, and as an ornamental gemstone.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness.
Field identification & locations
Identify by its opaque earthy luster, conchoidal breakage, and lack of reactivity to acid. Found globally in alluvial deposits and hydrothermal veins.
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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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