mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White to translucent milky white, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: Indistinct/Conchoidal fracture, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to translucent milky white, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: Indistinct/Conchoidal fracture, Specific Gravity: 2.65
Formation & geological history
Formed through the cooling of silica-rich hydrothermal veins or within pegmatites. The milky color is caused by microscopic inclusions of fluids or gas trapped during crystal growth.
Uses & applications
Used in glass manufacturing, abrasives, electronics (piezoelectric properties), and as decorative landscaping stone or semi-precious gemstones.
Geological facts
Quartz is one of the most abundant minerals in Earth's crust. Milky quartz is the most common variety of crystalline quartz found in nature.
Field identification & locations
Identify in the field by its hardness (scratches glass), lack of cleavage, and white waxy appearance. Commonly found in river beds, mountainous regions, and garden soil across the globe.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous