mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to off-white/translucent; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to off-white/translucent
Luster: Vitreous to waxy

Identified April 3, 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 scale); Color: White to off-white/translucent; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed through the crystallization of silica-rich magma or precipitation from hydrothermal veins. This specific specimen has been chemically and physically weathered and rounded by water action in a stream or beach environment.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), abrasives, and as a common decorative landscape stone. Tumbled specimens are used in jewelry and crystal collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which likely originated from Slavic words meaning 'hard'.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and lack of cleavage. It is commonly found in riverbeds, beaches, and gravel pits across the globe. To collectors, it is a basic staple mineral.