Quartz Pebble

Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, conchoidal fracture, no true cleavage, specific gravity of 2.65.

Formed through crystallization from silicate melts in igneous rocks or as a precipitate in hydrothermal veins. Over long periods of time, weathering and water transport erode and smooth the quartz into rounded pebbles.

Used in landscaping, decorative stone, glass manufacturing, electronics, and lapidary work.

Quartz is one of the most abundant and durable minerals in Earth's continental crust, making up a large percentage of beach sand and river pebbles.

Easily identifiable by its high hardness (scratches glass), lack of cleavage, and resistance to chemical weathering. Found worldwide in rivers, streams, and beaches.