Granite Gneiss River Rock

Hardness 6-7, grey to tan color, foliated texture, granular structure, dull to slightly shiny luster due to mica content

Formed from regional metamorphism of igneous or sedimentary rocks under high temperature and pressure, typically in deep continental crust. This specific piece has been weathered and rounded by water transport in a river or glacial environment.

Commonly used in construction, landscaping, and as building stone. Rounded specimens have little specific collector value but are popular in landscaping.

The rounded shape indicates significant transport by water. Gneiss is characterized by its banding, though typical banding may be subtle or less distinct in highly weathered river cobbles.

Identify by its crystalline texture, presence of quartz and feldspar, and possible subtle foliation or banding. Often found in riverbeds, glacial till, and beaches near mountainous areas.