mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs), Color: White/Opaque, Luster: Vitreous to Greasy, Crystal Structure: Trigonal/Hexagonal, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs), Color: White/Opaque, Luster: Vitreous to Greasy, Crystal Structure: Trigonal/Hexagonal, Specific Gravity: 2.65
Formation & geological history
Forms in hydrothermal veins, pegmatites, and through the cooling of silica-rich magma or precipitation from silica-rich fluids over millions of years.
Uses & applications
Used in construction as crushed stone, in glass manufacturing, as a gemstone (tumbled or focal), and as an abrasive in industrial applications.
Geological facts
The 'milky' appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth. It is the most common variety of crystalline quartz on Earth.
Field identification & locations
Identified by its white opacity, lack of cleavage, and ability to scratch glass. Found globally in almost every geological environment, especially in mountain ranges.
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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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
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