sedimentary
Yellow Jasper
Microcrystalline quartz, SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque yellow to mustard color, waxy luster, and a microcrystalline or cryptocrystalline crystal structure with conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque yellow to mustard color, waxy luster, and a microcrystalline or cryptocrystalline crystal structure with conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary deposits or volcanic ash, where silica-rich fluids replace organic material or fill cavities.
Uses & applications
Widely used in lapidary arts for making cabochons, beads, decorative carvings, and as a collector specimen.
Geological facts
Jasper has been used since ancient times for talismans and weaponry due to its durability and smooth fracture.
Field identification & locations
Identified by its waxy luster, distinct yellow color patterns, and conchoidal fracture. Found worldwide in regions with ancient volcanic or sedimentary activity.
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