mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: White to pale pink or translucent. Luster: Vitreous to greasy. Crystal Structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to pale pink or translucent
Luster: Vitreous to greasy

Identified August 1, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White to pale pink or translucent. Luster: Vitreous to greasy. Crystal Structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific Gravity: 2.65.

Formation & geological history

Formed through crystallization in igneous, metamorphic, and sedimentary environments. Quartz is highly resistant to weathering, allowing it to survive erosion processes as rounded pebbles in rivers and beaches.

Uses & applications

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

Geological facts

Quartz is one of the most abundant and durable minerals in the Earth's continental crust. Its piezoelectric properties make it useful in electronic oscillators and timekeeping devices.

Field identification & locations

Identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Commonly found globally in stream beds, gravel bars, and sedimentary deposits.