sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, various colors including red, brown, yellow, and green due to iron impurities, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, various colors including red, brown, yellow, and green due to iron impurities, conchoidal fracture with no true cleavage.
Formation & geological history
Forms from silica-rich fluids precipitating in sedimentary environments or hydrothermal veins, often over millions of years.
Uses & applications
Used for ornamental carvings, polished cabochons in jewelry, and geological specimen collecting.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness and ability to take a high polish.
Field identification & locations
Can be identified by its opaque appearance, hardness scratching glass, and smooth waxy luster when tumbled. Found globally in riverbeds and mountainous regions.
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