mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
Hardness: 7 on the Mohs scale. Color: White to translucent for the quartz vein, grayish-brown for the host rock. Luster: Vitreous (glassy) for the quartz. Crystal structure: Trigonal (quartz). Cleavage: None (conchoidal fracture). Specific gravity: 2.65
- Hardness
- 7 on the Mohs scale
- Luster
- Vitreous (glassy) for the quartz
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Physical properties
Hardness: 7 on the Mohs scale. Color: White to translucent for the quartz vein, grayish-brown for the host rock. Luster: Vitreous (glassy) for the quartz. Crystal structure: Trigonal (quartz). Cleavage: None (conchoidal fracture). Specific gravity: 2.65
Formation & geological history
Formed through hydrothermal processes where mineral-rich silica fluids circulated through fractures in pre-existing rocks and precipitated to fill the cracks, creating a quartz vein.
Uses & applications
Mostly collected as geological specimens, lapidary work, and industrial silica sources.
Geological facts
Vein structures like this are common indicators of past hydrothermal activity and are often associated with ore deposition, including gold and other precious metals.
Field identification & locations
Easily identified in the field by the stark contrast between the bright white or translucent quartz vein and the darker surrounding host rock. Found globally in various metamorphic and igneous terrains.
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