sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on Mohs scale, opaque yellow-brown color, waxy to dull luster, and conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on Mohs scale, opaque yellow-brown color, waxy to dull luster, and conchoidal fracture.
Formation & geological history
Formed from silica-rich sediments or volcanic ash, often precipitated in marine environments or hydrothermal veins.
Uses & applications
Used primarily in ornamental carvings, cabochons, jewelry, and lapidary art.
Geological facts
Yellow jasper has been utilized for thousands of years in ancient seals, amulets, and decorative items.
Field identification & locations
Identified by its opaque nature, lack of cleavage, and smooth water-worn texture; commonly found in riverbeds and gravel deposits worldwide.
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