sedimentary
Jasper
Silicon Dioxide with impurities (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, opaque luster, microcrystalline quartz structure, uneven fracture, and specific gravity of 2.58-2.91.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, opaque luster, microcrystalline quartz structure, uneven fracture, and specific gravity of 2.58-2.91.
Formation & geological history
Formed through the precipitation of silica-rich solutions in sedimentary environments or volcanic ash beds, often dating back over hundreds of millions of years.
Uses & applications
Widely used in ornamental carvings, cabochons for jewelry, decorative objects, and as a popular specimen for rock collectors.
Geological facts
Jasper has been used since antiquity for ancient seals, talismans, and weaponry. It derives its rich multi-colored patterns from various mineral impurities like iron oxides.
Field identification & locations
Identify by its waxy luster, conchoidal fracture, and inability to be scratched by a steel knife. Common worldwide, especially in areas with ancient volcanic or sedimentary activity.
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