sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque yellow-brown color, vitreous to waxy luster, and microcrystalline trigonal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque yellow-brown color, vitreous to waxy luster, and microcrystalline trigonal structure.
Formation & geological history
Forms from the precipitation of silica-rich fluids in sedimentary environments or volcanic ash deposits over millions of years.
Uses & applications
Widely used for lapidary work, ornamental carvings, cabochons, and gemstone jewelry.
Geological facts
Jasper has been used since ancient times for seals, talismans, and primitive tools due to its durability and rich color patterns.
Field identification & locations
Identified by its conchoidal fracture, lack of cleavage, and complete opacity; found globally in riverbeds and mountainous regions.
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Fossiliferous Sedimentary Rock
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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