sedimentary
Yellow Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Hardness of 6.5-7 on the Mohs scale, yellow to brownish-yellow color with mottled or patterned appearance, waxy to vitreous luster, cryptocrystalline or microcrystalline structure, conchoidal fracture, specific gravity around 2.58-2.91.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, yellow to brownish-yellow color with mottled or patterned appearance, waxy to vitreous luster, cryptocrystalline or microcrystalline structure, conchoidal fracture, specific gravity around 2.58-2.91.
Formation & geological history
Formed through the precipitation of silica-rich solutions in sedimentary environments or volcanic ash beds, often replacing organic material or filling cavities over millions of years.
Uses & applications
Used primarily in lapidary arts, making cabochons, beads, ornamental carvings, and as a collector's mineral specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. Yellow jasper was historically valued by various cultures for its connection to the sun and earth energies.
Field identification & locations
Can be identified by its opaque yellow color, hardness that scratches glass, and smooth waxy feel when polished. Found worldwide in regions with volcanic and sedimentary activity.
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