igneous
Tumbled gray feldspar-rich stone, possibly granite or quartzite
Indeterminate; likely quartz–feldspar aggregate, potentially fine-grained granite or quartzite
AI-generated identification · may be incorrectHardness approximately 6–7 Mohs; gray to lavender-gray, granular texture, vitreous to dull luster, with no obvious cleavage visible because it is polished. Exact identification requires a fresh surface, hardness test, and mineral inspection.
Identified More igneous →
Explore Tumbled gray feldspar-rich stone, possibly granite or quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness approximately 6–7 Mohs; gray to lavender-gray, granular texture, vitreous to dull luster, with no obvious cleavage visible because it is polished. Exact identification requires a fresh surface, hardness test, and mineral inspection.
Formation & geological history
Likely a natural silicate rock formed by crystallization of magma (granite) or metamorphism of sandstone (quartzite), generally Precambrian to Phanerozoic in age. The smooth shape is from human tumbling and polishing.
Uses & applications
Used mainly as a decorative tumbled stone, paperweight, or craft material; if granite, related rock is used in countertops and construction, while quartzite is used for aggregate and architectural stone.
Geological facts
The image does not show diagnostic crystals or layering, so a precise species-level identification is not possible from appearance alone. Its pale, mottled surface suggests abundant quartz and feldspar rather than a single mineral.
Field identification & locations
Common source regions include granitic and metamorphic terrains worldwide. A glass-scratching hardness test, visible feldspar cleavage, and acid resistance can help distinguish granite from quartzite; inspect an unpolished edge for confirmation.
