mineral

Yellow Quartz River Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: Pale yellow to tan; Luster: Waxy to vitreous; Crystal Structure: Hexagonal (cryptocrystalline or microcrystalline); Specific Gravity: 2.65

Hardness: 7 Mohs
Color: Pale yellow to tan
Luster: Waxy to vitreous

Identified July 6, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Pale yellow to tan; Luster: Waxy to vitreous; Crystal Structure: Hexagonal (cryptocrystalline or microcrystalline); Specific Gravity: 2.65

Formation & geological history

Formed through the deposition of silica-rich fluids in rock cavities or veins. This specimen shows significant rounding and smoothing due to fluvial (river) erosion over many years.

Uses & applications

Used primarily as decorative landscaping stone, in aquarium decor, or as a pocket stone for collectors.

Geological facts

Quartz is one of the most abundant minerals on Earth's crust. Yellow coloration in common quartz is often due to iron oxide inclusions or trace impurities within the crystal lattice.

Field identification & locations

Look for a smooth, rounded exterior with a waxy feel. It will scratch glass but cannot be scratched by a steel knife. Common in riverbeds, beaches, and glacial till worldwide.