mineral
Milky quartz
Quartz (SiO₂), typically massive milky quartz
AI-generated identification · may be incorrectWhite to translucent, vitreous-to-greasy luster, uneven fracture, no cleavage; Mohs hardness 7 and specific gravity about 2.65. The specimen appears massive, so distinct crystal faces are not visible.
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Physical properties
White to translucent, vitreous-to-greasy luster, uneven fracture, no cleavage; Mohs hardness 7 and specific gravity about 2.65. The specimen appears massive, so distinct crystal faces are not visible.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or as a common constituent of igneous and metamorphic rocks. Quartz spans much of Earth’s geological history; the specimen’s age and precise setting cannot be determined from the image.
Uses & applications
Used in glassmaking, electronics, abrasives, and construction aggregate; attractive pieces are used decoratively or in inexpensive jewelry.
Geological facts
Its cloudy appearance usually results from microscopic fluid inclusions or defects that scatter light.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and irregular fracture; common worldwide in quartz veins, pegmatites, and many rocks. The image is consistent with rough milky quartz, though visual identification alone is not definitive.
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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