mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, vitreous to dull where fractured; Mohs hardness 7, trigonal crystal structure, no cleavage, and conchoidal fracture. Specific gravity is about 2.65.
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Physical properties
White to translucent, vitreous to dull where fractured; Mohs hardness 7, trigonal crystal structure, no cleavage, and conchoidal fracture. Specific gravity is about 2.65.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes. Quartz is found in rocks of many geological ages.
Uses & applications
Commonly used as a decorative stone, in carvings and jewelry, and as an industrial source of silica for glass and other products.
Geological facts
Quartz is one of Earth’s most abundant minerals and occurs in many colors and varieties.
Field identification & locations
The specimen appears to be a white, fractured quartz fragment; hardness and glass-scratching ability can help identify it. Quartz is widespread worldwide, especially in veins and granitic or metamorphic rocks.
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