sedimentary
Jasper Pebble
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, reddish-brown and grayish color, vitreous to dull luster, cryptocrystalline structure, conchoidal fracture, specific gravity around 2.58 to 2.91
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, reddish-brown and grayish color, vitreous to dull luster, cryptocrystalline structure, conchoidal fracture, specific gravity around 2.58 to 2.91
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks where silica-rich fluids replace original material, often shaped into a smooth pebble by wave action on a beach.
Uses & applications
Used for lapidary work, making jewelry, ornamental carvings, and as a collector's specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. Beach pebbles like this are smoothed over thousands of hours of tumbling in water and sand.
Field identification & locations
Found worldwide in riverbeds, beaches, and ancient deposits. Easily identified by its hardness, opacity, and smooth water-worn surface.
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