mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectLikely massive, milky quartz with a white-to-gray color and vitreous-to-dull luster. Mohs hardness 7; trigonal crystal structure, no cleavage, and irregular to conchoidal fracture; specific gravity about 2.65.
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Physical properties
Likely massive, milky quartz with a white-to-gray color and vitreous-to-dull luster. Mohs hardness 7; trigonal crystal structure, no cleavage, and irregular to conchoidal fracture; specific gravity about 2.65.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and fractures, or during igneous and metamorphic processes. Quartz is common in rocks of many ages; the specimen’s exact age and source cannot be determined from the photo.
Uses & applications
Used as an ornamental and collectible material; quartz is also important in glassmaking, electronics, and construction aggregate.
Geological facts
Quartz is one of Earth’s most abundant minerals and resists weathering, allowing it to persist in soils and sediments.
Field identification & locations
The pale, translucent appearance and lack of cleavage are consistent with massive quartz, though the photo alone cannot confirm the identification. Common worldwide in veins, pegmatites, and many igneous and metamorphic rocks.
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