mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, vitreous luster, typically massive with no visible crystal faces; Mohs hardness 7, no cleavage, uneven to conchoidal fracture, specific gravity about 2.65. The specimen appears consistent with rough milky quartz.
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Physical properties
White to translucent, vitreous luster, typically massive with no visible crystal faces; Mohs hardness 7, no cleavage, uneven to conchoidal fracture, specific gravity about 2.65. The specimen appears consistent with rough milky quartz.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes. Quartz is widespread in rocks of many geological ages.
Uses & applications
Commonly used for mineral collecting, carving, and decorative stone; quartz is also an important industrial source of silica, though clear, gem-quality varieties are more suitable for jewelry.
Geological facts
Its cloudy appearance comes from microscopic fluid or gas inclusions and structural defects that scatter light.
Field identification & locations
Look for hardness sufficient to scratch glass, glassy luster, and lack of cleavage; it is common in quartz veins and many gravel deposits worldwide. A photo alone cannot confirm identity.
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