mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: Clear to white; Luster: Vitreous/glassy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- Clear to white
- Luster
- Vitreous/glassy
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Physical properties
Hardness: 7 (Mohs scale); Color: Clear to white; Luster: Vitreous/glassy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65
Formation & geological history
Formed through the precipitation of silica-rich water in cavities (vugs) or veins within various rock types, often associated with hydrothermal activity or volcanic gas bubble cooling.
Uses & applications
Used in jewelry (especially druzy pendants), glass making, electronics (piezoelectric properties), and as a common specimen for mineral collectors.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Druzy refers to the coating of fine crystals on a rock fracture or pocket.
Field identification & locations
Look for a sugary, glittering appearance on a host rock surface. It will scratch glass easily. Commonly found worldwide in geodes and volcanic areas.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary