mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂), likely milky or translucent quartz
AI-generated identification · may be incorrectMohs hardness 7; white to translucent, vitreous luster, trigonal crystal structure, and no cleavage (conchoidal fracture). The smooth oval shape indicates it has been tumbled or polished.
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Physical properties
Mohs hardness 7; white to translucent, vitreous luster, trigonal crystal structure, and no cleavage (conchoidal fracture). The smooth oval shape indicates it has been tumbled or polished.
Formation & geological history
Quartz forms when silica crystallizes in igneous or hydrothermal environments and is also common in veins and metamorphic rocks. Its age cannot be determined from the photograph.
Uses & applications
Used for jewelry, ornaments, and mineral collecting; quartz also has extensive industrial uses in glassmaking and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals; microscopic fluid or gas inclusions commonly make milky quartz appear cloudy.
Field identification & locations
Identify by its glassy luster, hardness, and lack of cleavage; common worldwide in veins and many rock types. The photograph shows a polished specimen, so field features are limited.
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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Unidentified pink-and-gray mineral or rock specimen
Undetermined; the image is too blurry for reliable identification
mineral