metamorphic
Quartz vein in Schist
Crystalline Silicon Dioxide (SiO2) in Metamorphic Host
Hardness: 7 (Quartz) vs 3-5 (Schist); Color: White/Honey-yellow quartz on gray-speckled host; Luster: Vitreous to greasy; Structure: Hexagonal crystals within a foliated matrix.
- Hardness
- 7 (Quartz) vs 3-5 (Schist)
- Color
- White/Honey-yellow quartz on gray-speckled host
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 (Quartz) vs 3-5 (Schist); Color: White/Honey-yellow quartz on gray-speckled host; Luster: Vitreous to greasy; Structure: Hexagonal crystals within a foliated matrix.
Formation & geological history
Formed through regional metamorphism where silica-rich fluids precipitated into fractures within a metamorphic host rock like schist during high pressure and temperature events.
Uses & applications
Primarily for mineral collecting; larger quartz veins are mined for glass manufacturing, electronics, and silicon production.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. These veins often serve as indicator minerals for gold and other precious metals in 'lode' deposits.
Field identification & locations
Identify in the field by the hard, glassy white material cutting across the layers of a softer, darker, leafy-textured rock. Found globally in mountainous regions.
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