mineral
Quartz Vein Rock
Silicon dioxide (SiO2) within a host rock matrix
AI-generated identification · may be incorrectHardness: 7 on the Mohs scale. Color: White to milky white with grey host rock. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.
- Hardness
- 7 on the Mohs scale
- Color
- White to milky white with grey host rock
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on the Mohs scale. Color: White to milky white with grey host rock. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.
Formation & geological history
Formed via hydrothermal processes where silica-rich fluids precipitate quartz within fractures and faults of pre-existing host rocks.
Uses & applications
Used in gemstone collection, decorative lapidary work, and as an indicator mineral in mineral exploration.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Can be identified by its high hardness (scratches glass), lack of cleavage, and distinct milky white appearance in field settings.
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Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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Septarian Pebble
Septarian nodule / Concretion
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