mineral

Quartz (Tumbled/Water-worn)

Silicon Dioxide (SiO2)

Hardness: 7 Mohs; Color: Pale yellowish-white to translucent; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal (hidden in macro-samples); Cleavage: None (conchoidal fracture).

Hardness: 7 Mohs
Color: Pale yellowish-white to translucent
Luster: Vitreous to waxy

Identified June 27, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 7 Mohs; Color: Pale yellowish-white to translucent; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal (hidden in macro-samples); Cleavage: None (conchoidal fracture).

Formation & geological history

Forms in a wide variety of igneous, metamorphic, and sedimentary environments. This specific specimen appears to be water-worn or tumbled, likely sourced from a riverbed or coastal area where erosion smoothed its edges.

Uses & applications

Used extensively in glassmaking, electronics (oscillators), abrasives, and as semi-precious gemstones in jewelry or for decorative purposes.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress.

Field identification & locations

Identify by its hardness (will scratch glass easily and cannot be scratched by a steel knife) and lack of cleavage. Commonly found in riverbeds, beaches, and mountain trails. Collectors should look for translucency and smooth texture.