mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
Hardness: 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
Identified More mineral →
Identify your own rocks.
Get a report just like this from any photo, free.
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.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral