mineral
Milky Quartz
Silicon Dioxide (SiO2)
Mohs hardness: 7; Color: White to cloudy white; Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7
- Color
- White to cloudy white
- Luster
- Vitreous to greasy
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Physical properties
Mohs hardness: 7; Color: White to cloudy white; Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed during the final stages of magma crystallization in hydrothermal veins and pegmatites. It is abundant in various geological environments and ages.
Uses & applications
Used in glassmaking, abrasives, electronics (due to piezoelectric properties), and as decorative stone in landscaping or jewelry.
Geological facts
The milky appearance is caused by tiny inclusions of gas and/or liquid trapped during crystal growth. It is one of the most common minerals in the Earth's crust.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and characteristic white cloudy appearance. Common in gravel beds and mountain regions.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
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
![Biotite Schist (Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]) — metamorphic](https://media.rock.id/9ca564b5-bc87-402b-965a-69b21f9aa6bf-thumbnail.jpg)
Biotite Schist
Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]
metamorphic