sedimentary
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque color ranging from red to brown, vitreous to dull luster, and microcrystalline structure with conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque color ranging from red to brown, vitreous to dull luster, and microcrystalline structure with conchoidal fracture.
Formation & geological history
Formed from silica-rich precipitates in marine environments or hydrothermal fluids, often accumulating in sedimentary layers over millions of years.
Uses & applications
Commonly used for ornamental carvings, polished cabochons in jewelry, and geological specimen collecting.
Geological facts
Jasper has been utilized by ancient civilizations since the 4th millennium BC for making seals, drills, and ritual amulets.
Field identification & locations
Identify by its dense, smooth surface, lack of cleavage, and waxy luster; frequently found in riverbeds and ancient alluvial deposits worldwide.
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