mineral
Tumbled milky quartz
Quartz (SiO₂), likely translucent white variety
AI-generated identification · may be incorrectMohs hardness 7; white to translucent with a vitreous-to-waxy polish, no visible cleavage, and a trigonal crystal structure. The smooth rounded shape is from tumbling; the photo alone cannot confirm the exact quartz variety.
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Physical properties
Mohs hardness 7; white to translucent with a vitreous-to-waxy polish, no visible cleavage, and a trigonal crystal structure. The smooth rounded shape is from tumbling; the photo alone cannot confirm the exact quartz variety.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or grows in igneous and metamorphic rocks. It forms across many geological ages and is widespread worldwide.
Uses & applications
Used for jewelry, ornaments, carvings, and mineral collecting; quartz is also important in glassmaking and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals and is resistant to weathering, allowing it to accumulate in many sediments.
Field identification & locations
Typical clues are hardness near 7, glassy luster, and lack of cleavage; common sources include Brazil, Madagascar, and the United States. This small polished piece appears to be a tumbled specimen.
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Pegmatite with Tourmaline and Quartz
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Granite
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Septarian Pebble
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