mineral
Milky Quartz with Chlorite/Epidote
Silicon Dioxide (SiO2) with phyllosilicate or sorosilicate inclusions
Hardness: 7 Mohs; Color: Opaque white to pale green with dark green streaks; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture)
- Hardness
- 7 Mohs
- Color
- Opaque white to pale green with dark green streaks
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 Mohs; Color: Opaque white to pale green with dark green streaks; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture)
Formation & geological history
Formed in hydrothermal veins or pegmatites where silica-rich fluids crystallized. The green streaks are typically caused by inclusions of chlorite or epidote minerals during the quartz growth process.
Uses & applications
Commonly used as decorative stones, in landscaping, as tumbling rough for hobbyists, and in some metaphysical jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Green quartz varieties like this are often found in metamorphic belts where hydrothermal activity has occurred.
Field identification & locations
Identified by its ability to scratch glass and its characteristic greasy luster. Often found in riverbeds as water-worn pebbles or in mountain outcrops.
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Epidote
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metamorphic
Gypsum (variety Selenite or Alabaster)
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Mineral
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Mineral/Rock
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