sedimentary
Yellow Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque yellow to brownish-yellow color, waxy to dull luster, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque yellow to brownish-yellow color, waxy to dull luster, and conchoidal fracture.
Formation & geological history
Forms from the silica-rich precipitation of hydrothermal solutions or silica-laden fluids in sedimentary environments.
Uses & applications
Used primarily in decorative items, cabochons, polished stones, and lapidary art.
Geological facts
Jasper has been used since ancient times for amulets, seals, and weaponry like arrowheads due to its toughness and ability to take a high polish.
Field identification & locations
Identify by its distinct yellow color, microcrystalline texture, and smooth conchoidal breakage. Found globally, often in riverbeds and ancient seabed deposits.
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