mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, milky white to translucent color due to microscopic fluid inclusions, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, milky white to translucent color due to microscopic fluid inclusions, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed in hydrothermal veins, pegmatites, and metamorphic environments from silicon-rich aqueous solutions cooling and precipitating over geological timescales.
Uses & applications
Used in mineral collections, ornamental carvings, glassmaking, and occasionally lapidary work.
Geological facts
Milky quartz is the most common variety of crystalline quartz found on Earth. The milky appearance is caused by minute gas or liquid inclusions trapped during crystal growth.
Field identification & locations
Easily identified by its white color, lack of cleavage, and high hardness which scratches glass. Found worldwide in nearly every geological environment.
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