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 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 luster, and conchoidal fracture.
Formation & geological history
Forms through the deposition of silica-rich fluids in sedimentary environments or hydrothermal veins, often during ancient volcanic activity.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, polished cabochons for jewelry, and as a collectible mineral specimen.
Geological facts
Jasper has been used since ancient times for talismans and seals. Its yellow color comes from clay and iron oxide inclusions within the quartz matrix.
Field identification & locations
Identify by its hardness scratching glass, distinct yellow color, and smooth waxy feel. Found globally in riverbeds and mountainous regions.
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