Rounded granitic gneiss pebble

Medium-grained, gray-tan, speckled rock with weak foliation and a dull to slightly sparkly luster; approximate Mohs hardness 6–7, no obvious cleavage as a whole, and typical specific gravity 2.6–2.7.

Likely a glacially or stream-rounded fragment of ancient continental crust; its gneissic banding formed during high-grade metamorphism, commonly from Precambrian protoliths billions of years old.

Primarily a natural collectible or landscape stone; similar durable gneiss is used for dimension stone, paving, riprap, and aggregate, but this small pebble has negligible commercial value.

The rounded shape records abrasion during transport, while the subtle light-dark mineral alignment suggests metamorphic foliation rather than uniform granite.

Identify it by visible quartz and feldspar grains, dark mica flecks, hardness sufficient to scratch glass, and possible faint banding; exact identification requires a fresh surface or thin section. Common in glacial tills, riverbeds, beaches, and regions underlain by metamorphic basement.