metamorphic
Orange Quartzite (River Pebble)
Quartzite (SiO2 with Iron Oxide inclusions)
Hardness: 7 (Mohs scale); Color: White to orange-peach; Luster: Vitreous to waxy; Structure: Granular/Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6 - 2.8
- Hardness
- 7 (Mohs scale)
- Color
- White to orange-peach
- 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 (Mohs scale); Color: White to orange-peach; Luster: Vitreous to waxy; Structure: Granular/Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6 - 2.8
Formation & geological history
Formed from the metamorphism of quartz-rich sandstone under intense heat and pressure, typically in tectonic mountain-building zones. This specific specimen has been further shaped into a water-worn pebble by fluvial erosion over thousands of years.
Uses & applications
Used primarily in landscaping, construction aggregate, and as 'river rock' for home decor. High-quality pieces are used as tumbling media for lapidary work or semi-precious gemstones.
Geological facts
Quartzite is so tough that it often outlasts the mountain ranges it formed in, breaking off into rivers where it becomesRounded over long distances. The orange tint is usually caused by trace amounts of hematite or limonite (iron oxides) staining the silica grains.
Field identification & locations
Identify by its ability to scratch glass and its granular, sugary texture when viewed closely. Found globally in riverbeds and glacial deposits. For collectors, look for smoothness and consistent saturation of color.
More like this
