mineral
Likely tumbled quartz or feldspar pebble
Indeterminate; possibly quartz (SiO₂) or potassium feldspar (KAlSi₃O₈)
AI-generated identification · may be incorrectSmall, rounded, opaque-to-translucent pinkish-brown pebble with a dull to slightly waxy luster; estimated Mohs hardness 6–7 if quartz, or 6–6.5 if feldspar. Crystal structure cannot be determined from the image.
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Physical properties
Small, rounded, opaque-to-translucent pinkish-brown pebble with a dull to slightly waxy luster; estimated Mohs hardness 6–7 if quartz, or 6–6.5 if feldspar. Crystal structure cannot be determined from the image.
Formation & geological history
Likely a naturally weathered or deliberately tumbled fragment of silicate rock; precise geological age and formation environment are indeterminate without testing. Pink coloration may reflect iron staining or feldspar composition.
Uses & applications
Common examples are used as decorative tumbled stones, craft material, and minor jewelry components; an isolated piece has little commercial value.
Geological facts
The image scale and lighting limit identification; hardness testing, streak, translucency, and a close view of fracture surfaces would distinguish quartz from feldspar and other materials.
Field identification & locations
Check whether it scratches glass (quartz generally does), examine cleavage (feldspar shows two good cleavage directions), and use a loupe for grains or crystal faces. Common source regions include granitic and metamorphic terrains worldwide.
