Quartz Pebble

Hardness of 7 on the Mohs scale, typically white, clear, or grey, vitreous to dull luster, conchoidal fracture, specific gravity of 2.65.

Forms in a wide variety of geological environments, often weathering out of igneous and metamorphic rocks and becoming rounded into pebbles through fluvial or marine transport.

Used in landscaping, decorative stone, abrasive manufacturing, and as a mineral specimen.

Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to both chemical and physical weathering.

Found worldwide in riverbeds, beaches, and glacial drift. Can be identified by its high hardness (scratches glass) and lack of cleavage.