metamorphic
Polished/tumbled quartz-rich pebble, possibly jasper or quartzite
Indeterminate; likely microcrystalline quartz (SiO₂), potentially iron-stained jasper or quartzite
AI-generated identification · may be incorrectSmall rounded specimen with a creamy white body, reddish-brown patches, and dull-to-waxy luster. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65; exact properties require testing.
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Physical properties
Small rounded specimen with a creamy white body, reddish-brown patches, and dull-to-waxy luster. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65; exact properties require testing.
Formation & geological history
Likely formed from silica-rich rock, with red coloration caused by iron oxides, then naturally rounded or mechanically tumbled and polished. The geological age cannot be determined from the photograph.
Uses & applications
Used as a decorative tumbled stone, craft material, or inexpensive cabochon; quartz-rich rock also has applications in aggregate and construction.
Geological facts
The image is insufficient for a definitive species identification; jasper, quartzite, chalcedony, or an iron-stained quartz pebble are plausible.
Field identification & locations
Test for hardness by checking whether it scratches ordinary glass; inspect with a loupe for granular quartz or waxy chalcedony texture. Common sources include quartz-rich gravels and silica-bearing formations worldwide.
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