Quartz Pebble

Hardness 7 on Mohs scale, translucent to clear white/gray color, vitreous to greasy luster, trigonal crystal structure, conchoidal fracture, no cleavage, specific gravity ~2.65.

Formed in hydrothermal veins, pegmatites, and as a primary constituent in igneous, metamorphic, and sedimentary rocks. Naturally rounded and smoothed through water action and erosion in riverbeds or coastal environments.

Used in landscaping, glass manufacturing, electronics (silicon source), abrasives, and as decorative river rocks or pocket stones.

Quartz is the second most abundant mineral in Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.

Look for a translucent pebble that scratches glass easily and leaves no streak. Very common in riverbeds, beaches, and soil worldwide.