Granite pebble

Coarse-grained, pale gray to pink and cream, with translucent gray quartz and weathered feldspar; vitreous to dull luster, interlocking crystals, Mohs hardness about 6–7, and no prominent cleavage as a whole. The rounded shape indicates natural water or beach abrasion, while brown patches are likely iron-oxide weathering.

Granite is an intrusive igneous rock crystallized slowly from silica-rich magma, commonly during Precambrian to younger continental crust formation; the pebble was later eroded from an outcrop and transported.

Used as crushed aggregate, building stone, countertops, monuments, and landscaping material; this small weathered specimen has mainly educational or decorative value.

Its visible texture reflects slow underground cooling, allowing crystals to grow large enough to see. Feldspar commonly alters to clay, producing the cream-colored weathering.

Identify it by the speckled quartz–feldspar–mica texture and lack of layering or foliation; granite is widespread in continental mountain belts and glacial or river gravels. A hand lens and glass-streak test help distinguish it from quartzite.