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, and comes in various colors including red, brown, yellow, and green.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, earthy to vitreous luster, opaque, and comes in various colors including red, brown, yellow, and green.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or hydrothermal veins, often associated with volcanic activity.
Uses & applications
Used primarily in lapidary work for making cabochons, jewelry, decorative carvings, and as a collector's specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its conchoidal fracture, opaque appearance, and high hardness that scratches glass; commonly found in riverbeds and mountainous regions worldwide.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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