mineral

Quartz Pebble (Iron-stained)

Crystalline Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Tan to honey-brown (due to iron oxide inclusions); Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Tan to honey-brown (due to iron oxide inclusions)
Luster: Vitreous to waxy

Identified July 21, 2026More mineral →

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Physical properties

Formation & geological history

Formed via hydrothermal activity or crystallization from cooling magma. This specific specimen has been Rounded by water erosion in a high-energy environment like a riverbed or shoreline, likely occurring over thousands of years.

Uses & applications

Commonly used as decorative gravel, in landscaping, or as a source of silica for glassmaking. Smooth pebbles are often used in aquariums or for stone massage.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz', which had its origins in Slavic and West Slavic languages.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), its translucent appearance when wet, and the lack of visible layers or planes. Found globally in almost every geological environment.

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