metamorphic
Quartzite with Veining
Quartzite (SiO2)
Hardness: 7 on Mohs scale; Color: white to light tan with visible layering; Luster: vitreous to dull; Crystal structure: Trigonal (granular texture); Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.7
- Hardness
- 7 on Mohs scale
- Color
- white to light tan with visible layering
- Luster
- vitreous to dull
Identified More metamorphic →
Explore Quartzite with Veining in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale; Color: white to light tan with visible layering; Luster: vitreous to dull; Crystal structure: Trigonal (granular texture); Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.7
Formation & geological history
Formed through the metamorphism of quartz sandstone under high heat and pressure, causing the original quartz grains to recrystallize into an interlocking mosaic. This specimen shows distinct banding or veining likely from thermal pulses during formation.
Uses & applications
Commonly used in construction as crushed stone, road ballast, and for decorative landscaping surfaces. High-quality slabs are used for countertops and flooring.
Geological facts
Quartzite is so durable that it resists weathering better than most other rocks, often forming the caps of ridges and mountains. It is harder than steel and will scratch glass easily.
Field identification & locations
Identify in the field by its hardness (will scratch a knife blade) and granular, sugary appearance on fresh breaks. It is found worldwide in mountainous metamorphic orogens.
