mineral
Yellow Quartz River Pebble
Silicon Dioxide (SiO2)
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
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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.
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