metamorphic
Green Quartzite
Metamorphic Quartzite (with Fuchsite inclusion, SiO2)
Hardness: 7 on Mohs scale. Color: Pale to mint green. Luster: Vitreous to sugary. Crystal structure: Trigonal (interlocking quartz grains). Specific gravity: ~2.65.
- Hardness
- 7 on Mohs scale
- Color
- Pale to mint green
- Luster
- Vitreous to sugary
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Physical properties
Hardness: 7 on Mohs scale. Color: Pale to mint green. Luster: Vitreous to sugary. Crystal structure: Trigonal (interlocking quartz grains). Specific gravity: ~2.65.
Formation & geological history
Formed through the regional metamorphism of quartz-rich sandstone under intense heat and pressure. The distinctive green hue is typically caused by inclusions of green chrome-rich mica known as fuchsite.
Uses & applications
Used primarily for ornamental stone, lapidary projects, gemstones (aventurine-like quartz), decorative carvings, and landscape construction.
Geological facts
Green quartzite containing micro-inclusions of fuchsite is often commercially sold as Green Aventurine, known for its shimmering or glistening effect called aventurescence.
Field identification & locations
Identified by its high hardness (scratches glass easily), granular crystalline texture, and pale green coloration. Commonly found in metamorphic terrains such as Brazil, India, Russia, and parts of the United States.
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