mineral
Milky quartz cluster
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectTranslucent to milky white with a vitreous luster and irregular, intergrown crystals. Mohs hardness 7; trigonal crystal structure, no cleavage, specific gravity about 2.65.
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Physical properties
Translucent to milky white with a vitreous luster and irregular, intergrown crystals. Mohs hardness 7; trigonal crystal structure, no cleavage, specific gravity about 2.65.
Formation & geological history
Likely crystallized from silica-rich fluids in a vein or cavity as the fluids cooled. Quartz forms in rocks of many ages; the specimen’s age and exact setting cannot be determined from the image.
Uses & applications
Commonly collected and used for decorative objects and jewelry; quartz is also important in glassmaking and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals and occurs in igneous, sedimentary, and metamorphic rocks.
Field identification & locations
Look for hardness sufficient to scratch glass and a lack of cleavage; milky quartz is common worldwide, especially in veins and pegmatites. The photo does not show diagnostic locality or scale.
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