metamorphic
Quartzite
Quartzite
AI-generated identification · may be incorrectHardness: 7; Color: typically white to grey, can be shades of pink, red, or purple depending on impurities; Luster: vitreous to dull; Crystal structure: massive; Cleavage: none; Specific gravity: 2.64-2.69
- Hardness
- 7
- Luster
- vitreous to dull
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Physical properties
Hardness: 7; Color: typically white to grey, can be shades of pink, red, or purple depending on impurities; Luster: vitreous to dull; Crystal structure: massive; Cleavage: none; Specific gravity: 2.64-2.69
Formation & geological history
Formed by the metamorphism of quartz sandstone under high heat and pressure, often found in ancient continental crust.
Uses & applications
Used in construction, as decorative stone, for making glass, and as ballast for railways.
Geological facts
Quartzite is highly resistant to chemical weathering and often forms ridges and resistant hilltops.
Field identification & locations
Identified by its hardness (scratches glass), granular texture, and lack of foliation. Common worldwide in metamorphic terranes.
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