sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5-7; opaque, earthy to vitreous luster; various warm colors due to iron impurities; conchoidal fracture.
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Physical properties
Mohs hardness of 6.5-7; opaque, earthy to vitreous luster; various warm colors due to iron impurities; conchoidal fracture.
Formation & geological history
Forms via silica-rich precipitation in marine or hydrothermal environments, often replacing organic material over millions of years.
Uses & applications
Used extensively in lapidary arts, ornamental carvings, and gemstone jewelry.
Geological facts
Jasper has been utilized by ancient humans since the Stone Age for tools and talismans.
Field identification & locations
Identified by its waxy luster, hardness, and opaque earthy patterns; common worldwide in riverbeds and ancient sedimentary deposits.
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