mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: White to translucent/cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal (often massive), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to translucent/cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal (often massive), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed from the crystallization of silica-rich solutions in hydrothermal veins and pegmatites. The milky white color is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in the production of glass, ceramics, and electronics (as a source of silicon). Also popular for landscaping, lapidary work, and as a healing stone in metaphysical communities.
Geological facts
Milky quartz is the most common variety of crystalline quartz. Historically, it was used with flint to create sparks for starting fires.
Field identification & locations
Identify in the field by its hardness (will scratch glass), cloudy white appearance, and lack of cleavage (breaks like glass). It is abundantly found in mountainous regions worldwide.
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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
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary