mineral
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Clear to white crystals on tan/brown host rock; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Color
- Clear to white crystals on tan/brown host rock
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: Clear to white crystals on tan/brown host rock; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed via hydrothermal precipitation where silica-rich fluids cooled in cavities or vugs within host rock, often in sedimentary or volcanic environments.
Uses & applications
Commonly used for lapidary work, jewelry, and as decorative mineral specimens for collectors.
Geological facts
The term 'druzy' refers to a coating of fine crystals on a rock surface. Quartz is the most common mineral to form druzy coatings due to its abundance in the Earth's crust.
Field identification & locations
Identify by the tiny, glittering crystal faces that sparkle like sugar. Found globally in areas with previous volcanic or seismic activity that created rock fractures.
