Granite

Coarse-grained, light gray to pinkish rock with visible interlocking crystals; quartz has Mohs hardness 7, feldspar 6–6.5, and mica 2–3. Typically vitreous quartz luster, no consistent cleavage as a whole, and specific gravity about 2.6–2.7.

A plutonic igneous rock formed by slow crystallization of silica-rich magma deep within continental crust, commonly during Precambrian to Phanerozoic mountain-building events.

Widely used for countertops, building stone, monuments, paving, aggregate, and dimension stone; attractive polished pieces are collected but usually have modest value.

The specimen’s granular texture and abundant pale minerals are consistent with granite, though a close-up or thin section would be needed to distinguish it confidently from quartz-rich gneiss or pegmatite.

Identify it by visible interlocking quartz and feldspar grains, speckled mica, and lack of layering or vesicles. Common worldwide, especially in continental shields and mountain belts; typical hand specimens are worth about $5–$25, while exceptional polished or unusual specimens may bring $50–$200.