mineral
Yellow Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
Hardness: 7 (Mohs scale); Color: Yellow-orange to honey-gold; Luster: Vitreous to waxy (when water-worn); Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- Yellow-orange to honey-gold
- Luster
- Vitreous to waxy (when water-worn)
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Physical properties
Hardness: 7 (Mohs scale); Color: Yellow-orange to honey-gold; Luster: Vitreous to waxy (when water-worn); Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed through crystallization of silica-rich hydrothermal fluids or as a primary mineral in igneous rocks. This specific specimen has been river-worn or tumbled by water erosion, giving it its rounded, sub-angular shape.
Uses & applications
Used primarily in jewelry as a decorative stone (often sold as citrine if natural color, or heated amethyst), as a gemstone for collectors, and in industrial applications for abrasive manufacturing.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. While this specimen has a yellow hue, most yellow quartz in the market is actually heat-treated amethyst, though natural citrine color exists.
Field identification & locations
Identify in the field by its hardness (will scratch glass easily) and lack of cleavage. Commonly found in riverbeds, beaches, and gravel deposits. Collectors look for clarity and intensity of color.
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