sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale; displays earthy, red, brown, or yellow colors due to iron impurities; waxy to dull luster; cryptocrystalline structure with conchoidal fracture.
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Physical properties
Hardness 6.5-7 on Mohs scale; displays earthy, red, brown, or yellow colors due to iron impurities; waxy to dull luster; cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Forms from the precipitation of silica-rich fluids within sedimentary environments or volcanic rocks, often accumulating in marine deposits over millions of years.
Uses & applications
Used primarily in lapidary work, ornamental carvings, cabochons, and as a semi-precious gemstone in jewelry.
Geological facts
Jasper has been utilized since ancient times for seals, talismans, and weaponry tools due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its opaque appearance, conchoidal fracture, and lack of visible crystal faces; commonly found in riverbeds and mountainous regions worldwide.
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