mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, vitreous luster, irregular fracture, and no cleavage; hardness 7 on the Mohs scale. The specimen appears to be a small, rough, opaque-to-translucent fragment; crystal form is trigonal, though not visible here.
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Physical properties
White to translucent, vitreous luster, irregular fracture, and no cleavage; hardness 7 on the Mohs scale. The specimen appears to be a small, rough, opaque-to-translucent fragment; crystal form is trigonal, though not visible here.
Formation & geological history
Forms in silica-rich igneous and metamorphic rocks and in hydrothermal veins, where silica crystallizes from cooling fluids. Quartz is common across many geological ages.
Uses & applications
Used in glassmaking, electronics, abrasives, and as a decorative or collecting mineral; this small rough piece has little jewelry value.
Geological facts
Quartz is among Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure.
Field identification & locations
Common worldwide in veins, pegmatites, and many rock types. Identify it by its glassy luster, hardness sufficient to scratch glass, and lack of cleavage; the photo alone cannot confirm the identification.
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igneous
Unidentified pink-and-gray mineral or rock specimen
Undetermined; the image is too blurry for reliable identification
mineral