sedimentary
Jasper Pebble
Microcrystalline Quartz (Chalcedony)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, yellowish-brown to tan color with darker spots, waxy luster, cryptocrystalline structure, conchoidal fracture, specific gravity around 2.58-2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, yellowish-brown to tan color with darker spots, waxy luster, cryptocrystalline structure, conchoidal fracture, specific gravity around 2.58-2.91.
Formation & geological history
Formed through the silification of sediments or volcanic ash, often deposited in marine or lacustrine environments and later smoothed by water action in riverbeds or beaches over geological timescales.
Uses & applications
Used for lapidary work, ornamental carvings, polished stones, and decorative landscaping.
Geological facts
Jasper has been used since ancient times for creating seals, signet rings, and intricate talismans due to its durability and rich earth-toned colors.
Field identification & locations
Commonly found in stream beds, gravel bars, and beaches. Identify by its high hardness, smooth water-worn texture, and opaque, dense appearance.
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