mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: White or milky due to microscopic fluid inclusions, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: Poor/Conchoidal fracture, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White or milky due to microscopic fluid inclusions, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: Poor/Conchoidal fracture, Specific Gravity: 2.65
Formation & geological history
Formed through hydrothermal processes where silica-rich fluids cool in veins or cavities within other rocks. It is found in igneous, metamorphic, and sedimentary environments worldwide.
Uses & applications
Used as an abrasive in sandpaper, in glassmaking, as a gemstone in cabochon form, and in construction as an aggregate. High-purity quartz is used in electronics and watches.
Geological facts
Milky quartz is the most common variety of crystalline quartz. Its white color is caused by tiny bubbles of gas or liquid trapped during the crystal's formation.
Field identification & locations
Identify in the field by its hardness (will scratch glass), white color, and lack of cleavage. It is found globally, particularly in mountain ranges and riverbeds. Look for conchoidal fractures and a greasy luster on fresh surfaces.
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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