sedimentary
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Colors range from brown, red, to yellow with a vitreous to dull luster and microcrystalline crystal structure.
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Physical properties
Mohs hardness of 6.5 to 7. Colors range from brown, red, to yellow with a vitreous to dull luster and microcrystalline crystal structure.
Formation & geological history
Formed by the silification of sedimentary or volcanic rocks, precipitating from silica-rich fluids over geological timescales.
Uses & applications
Used primarily in jewelry, ornamental carvings, and as a decorative stone.
Geological facts
Jasper has been used since ancient times for seals, talismans, and decorative items.
Field identification & locations
Identified by its opaque appearance, conchoidal fracture, and lack of cleavage. Common in riverbeds and mountainous regions.
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