metamorphic
Green Quartzite
Meta-quartzite with fuchsite or chlorite inclusion
Hardness: 7 on Mohs scale; Color: Dull grayish-green with sparkly white quartz inclusions; Luster: Vitreous to dull; Crystal structure: Granoblast (sugary texture); Cleavage: None, fractures irregularly.
- Hardness
- 7 on Mohs scale
- Color
- Dull grayish-green with sparkly white quartz inclusions
- Luster
- Vitreous to dull
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Physical properties
Hardness: 7 on Mohs scale; Color: Dull grayish-green with sparkly white quartz inclusions; Luster: Vitreous to dull; Crystal structure: Granoblast (sugary texture); Cleavage: None, fractures irregularly.
Formation & geological history
Formed through high-temperature and pressure metamorphism of quartz-rich sandstone, where mineral impurities such as fuchsite mica or chlorite impart a greenish color.
Uses & applications
Used in construction as crushed stone or decorative gravel, for dimension stone in landscaping, and as a durable mineral specimen for beginner collections.
Geological facts
Quartzite is extremely tough and resistant to chemical weathering. When struck, it breaks across the quartz grains rather than around them, unlike sandstone.
Field identification & locations
Look for a granular, sugary texture that cannot be scratched easily with steel (harder than glass). Very common in mountain belts and ancient metamorphic terrains globally.
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