sedimentary
Yellow Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness 6.5 to 7; opaque yellow to brownish-yellow color; vitreous to dull luster; microcrystalline quartz structure with conchoidal fracture.
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Physical properties
Mohs hardness 6.5 to 7; opaque yellow to brownish-yellow color; vitreous to dull luster; microcrystalline quartz structure with conchoidal fracture.
Formation & geological history
Forms via the precipitation of silica-rich solutions in sedimentary environments or hydrothermal veins, often over millions of years.
Uses & applications
Used primarily in lapidary arts for making cabochons, beads, ornamental carvings, and as a popular collector specimen.
Geological facts
Jasper has been used since ancient times for talismans and seals. The yellow coloration is primarily due to clay or iron oxide inclusions.
Field identification & locations
Identify by its hardness (scratches glass), waxy luster, and opaque yellow hue. Commonly found in riverbeds and alluvial deposits worldwide.
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