mineral
Tumbled clear quartz
Quartz (SiO₂)
AI-generated identification · may be incorrectMohs hardness 7; transparent to translucent and colorless, with a vitreous luster and trigonal crystal structure. The rounded, glossy surface is from tumbling; natural quartz has no prominent cleavage and breaks conchoidally.
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Physical properties
Mohs hardness 7; transparent to translucent and colorless, with a vitreous luster and trigonal crystal structure. The rounded, glossy surface is from tumbling; natural quartz has no prominent cleavage and breaks conchoidally.
Formation & geological history
Quartz crystallizes from silica-rich fluids and melts in many geological settings, including veins and igneous rocks; specimens form across a wide range of geological ages. This piece has been mechanically tumbled and polished.
Uses & applications
Used in jewelry, ornaments, and collections; quartz is also important in glassmaking and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals and can occur in igneous, sedimentary, and metamorphic rocks.
Field identification & locations
The clear, glassy appearance and hardness help distinguish quartz; it is commonly found worldwide. The image shows a small polished pebble, so its precise source cannot be identified visually.
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Granite
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