sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors including yellow and brown, conchoidal fracture, and a specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, various earth-tone colors including yellow and brown, conchoidal fracture, and a specific gravity of 2.58 to 2.91.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks where silica-rich fluids replace organic material or fill cavities over geological timescales.
Uses & applications
Widely utilized in making cabochons, jewelry, decorative carvings, and sought after by rockhounds and mineral collectors.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components due to its toughness and ability to take a high polish.
Field identification & locations
Identify in the field by its opaque appearance, waxy luster, microcrystalline texture, and hardness that easily scratches glass.
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