mineral
Tumbled milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectA rounded, opaque white-to-cream specimen with a waxy to vitreous luster; quartz has hardness 7 Mohs, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The image is low-detail, so identification is approximate.
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Physical properties
A rounded, opaque white-to-cream specimen with a waxy to vitreous luster; quartz has hardness 7 Mohs, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The image is low-detail, so identification is approximate.
Formation & geological history
Forms when silica-rich fluids crystallize in veins, cavities, or igneous rocks; the specimen appears human-shaped by tumbling and polishing. Quartz ranges from Precambrian to recent in age and occurs worldwide.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and countertops; attractive tumbled pieces are sold for collections, crafts, and décor.
Geological facts
Milky quartz contains microscopic fluid inclusions or structural defects that scatter light, producing its cloudy appearance.
Field identification & locations
Likely quartz if it scratches ordinary glass and does not react with dilute acid; it should feel relatively hard and heavy for its size. Common sources include Brazil, Madagascar, the United States, and worldwide quartz-bearing veins.
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