mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 Mohs scale; Color: Pale yellowish-brown to waxy white; Luster: Vitreous to greasy; Crystal Structure: Trigonal (hexagonal in macroform); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 Mohs scale
Color: Pale yellowish-brown to waxy white
Luster: Vitreous to greasy

Identified June 30, 2026More mineral →

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Physical properties

Formation & geological history

Formed in various geological environments including cooling magma and hydrothermal veins. This specimen shows significant rounding and frosting characteristic of fluvial (river) or coastal erosion processes.

Uses & applications

Commonly used as decorative landscape stone, in aquariums, or as a pocket stone for collectors. High-purity quartz is used in glass making and electronics.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz', which had a Slavic origin meaning 'hard'.

Field identification & locations

Identified by its inability to be scratched by steel, waxy luster, and lack of cleavage. Found globally in riverbeds, beaches, and sedimentary deposits. Collectors look for clarity and intensity of color.