mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to cream, opaque, with a vitreous-to-dull luster and irregular fracture; hardness 7 on the Mohs scale, trigonal crystal structure, and no cleavage. The specimen’s rough, blocky shape and surface wear make visual identification probable but not definitive.
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Physical properties
White to cream, opaque, with a vitreous-to-dull luster and irregular fracture; hardness 7 on the Mohs scale, trigonal crystal structure, and no cleavage. The specimen’s rough, blocky shape and surface wear make visual identification probable but not definitive.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes. Quartz occurs in rocks of many ages, from ancient crust to modern veins.
Uses & applications
Commonly used as a decorative and collectible mineral; quartz is also used in glass, electronics, and engineered stone.
Geological facts
Quartz is among Earth’s most abundant minerals; its hardness lets it scratch ordinary glass.
Field identification & locations
Look for glassy luster, lack of cleavage, and hardness near 7; common in veins and many rock types worldwide. The image alone cannot confirm the identification.
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Mineral