mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White to translucent (milky due to fluid inclusions), Luster: Vitreous to greasy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (Conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to translucent (milky due to fluid inclusions), Luster: Vitreous to greasy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (Conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed through hydrothermal processes in veins, or through the cooling of silica-rich magma in igneous rocks. It is common in pegmatites and metamorphic environments.
Uses & applications
Used in the manufacturing of glass, ceramics, and abrasives. Also used in construction aggregate, landscaping, and as a semi-precious gemstone in jewelry or metaphysical collecting.
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 crystal growth.
Field identification & locations
Identify by its ability to scratch glass (hardness 7), lack of cleavage, and white, cloudy appearance. It is found globally in large veins and as river cobbles.
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