mineral

Quartz Pebble (Grit)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Tan to translucent white; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Tan to translucent white
Luster: Vitreous

Identified May 27, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Tan to translucent white; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed in igneous or metamorphic environments as part of larger rock masses, later eroded, weathered, and transported by water to become rounded sediment. This specimen is an individual grain of sand or grit.

Uses & applications

Large-scale quartz sand is used in glass manufacturing, abrasives, hydraulic fracturing, and as a component in concrete and mortar.

Geological facts

Quartz is the second most abundant mineral in the Earth's continental crust. It is highly resistant to chemical and physical weathering, which is why small pebbles like this persist in diverse environments.

Field identification & locations

Identified by its hardness (it can scratch glass), lack of cleavage, and translucent appearance. Commonly found on beaches, riverbeds, and in soil globally.