mineral
Tumbled milky quartz
Quartz (SiO₂), likely milky quartz
AI-generated identification · may be incorrectA small, rounded, translucent-to-opaque white specimen with a glassy luster and irregular internal fractures. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65.
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Physical properties
A small, rounded, translucent-to-opaque white specimen with a glassy luster and irregular internal fractures. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65.
Formation & geological history
Quartz crystallizes from silica-rich fluids in veins and cavities, or occurs in igneous and metamorphic rocks; its age depends on the source deposit. The smooth shape suggests it may have been mechanically tumbled.
Uses & applications
Commonly used for inexpensive jewelry, décor, and mineral collections; quartz is also important in glassmaking and electronics.
Geological facts
Milky color results from microscopic fluid or gas inclusions that scatter light.
Field identification & locations
Identify by its hardness, glassy appearance, and lack of cleavage; common worldwide in quartz veins and many rock types. The image supports a general quartz identification, but not a precise variety.
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