mineral
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Clear to white crystals on a brown/greenish basaltic or sedimentary matrix; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Clear to white crystals on a brown/greenish basaltic or sedimentary matrix; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65
Formation & geological history
Formed through hydrothermal processes where silica-rich fluids precipitate into cavities or vugs within host rock. This specific specimen appears to be a section of a small geode or crust. Geological age varies by location, often millions of years old.
Uses & applications
Primarily used for mineral collecting, metaphysical 'healing' crystals, and occasionally crushed for industrial abrasives or glassmaking if found in massive quantities.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Small 'druzy' formations like this are often the results of the final stage of geode development.
Field identification & locations
Identify by testing hardness (will scratch glass) and observing the tiny, sparkling crystal points. Common globally, especially in volcanic regions like Brazil, Uruguay, or the American Southwest.
