metamorphic
Quartzite Pebble
Quartzite (SiO2)
Hardness: 7 (Mohs scale), Color: White with brownish iron-oxide staining, Luster: Dull to vitreous, Crystal structure: Granular/Microcrystalline, SG: 2.6-2.7.
Identified More metamorphic →
Explore Quartzite Pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs scale), Color: White with brownish iron-oxide staining, Luster: Dull to vitreous, Crystal structure: Granular/Microcrystalline, SG: 2.6-2.7.
Formation & geological history
Formed from the metamorphism of quartz sandstone under high heat and pressure. It often undergoes rounding and polishing in riverbeds or coastal environments.
Uses & applications
Commonly used in construction as crushed stone for roads, ballast, and decoration. Highly rounded pieces are used in 'river rock' landscaping.
Geological facts
Quartzite is harder than the parent sandstone and will break through the quartz grains rather than around them. It is one of the most chemically resistant rocks on Earth's surface.
Field identification & locations
Check for its ability to scratch glass and look for a non-foliated, granular texture. It is frequently found in riverbeds, glacial deposits, and mountain ranges.
More like this
