metamorphic
Yellow Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
Hardness: 7 on Mohs scale; Color: Yellowish-orange; Luster: Vitreous to waxy; Structure: Granular/Crystalline; Density: 2.6-2.7 g/cm3; Cleavage: None
- Hardness
- 7 on Mohs scale
- Color
- Yellowish-orange
- Luster
- Vitreous to waxy
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale; Color: Yellowish-orange; Luster: Vitreous to waxy; Structure: Granular/Crystalline; Density: 2.6-2.7 g/cm3; Cleavage: None
Formation & geological history
Formed from the metamorphism of quartz-rich sandstone under heat and pressure. This specimen shows significant rounding, suggesting it was transported by water in a river or coastal environment over thousands of years.
Uses & applications
Common varieties are used for construction aggregate, track ballast, and landscaping. Polished pebbles are used for aquarium decor and occasionally low-cost costume jewelry.
Geological facts
Quartzite is so hard and chemically resistant that it often forms the caps of mountains and ridges. This specific pebble contains iron oxide inclusions that give it its distinct yellow-to-amber hue.
Field identification & locations
Identify in the field by its hardness (it will scratch glass) and its sugary, granular texture where fractured. Commonly found in glacial tills, riverbeds, and along beaches.
More like this
