mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness 7, white to translucent color with a vitreous to greasy luster, trigonal crystal system, and conchoidal fracture with no true cleavage.
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Physical properties
Mohs hardness 7, white to translucent color with a vitreous to greasy luster, trigonal crystal system, and conchoidal fracture with no true cleavage.
Formation & geological history
Forms primarily from hydrothermal veins and cooling magma chambers over diverse geological eras worldwide.
Uses & applications
Used in glass manufacturing, abrasives, electronics, and as a common lapidary or specimen material.
Geological facts
It is the most common variety of crystalline quartz found on Earth, often appearing milky due to microscopic fluid inclusions.
Field identification & locations
Identified easily by its white color, high hardness that scratches glass, and lack of cleavage; found globally in nearly all rock types.
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Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
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Limonite
FeO(OH)•nH2O
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
mineral