mineral
Milky quartz with iron staining
Quartz (SiO₂), likely iron-oxide-stained massive quartz
AI-generated identification · may be incorrectHardness 7 Mohs; white to translucent with rusty yellow-brown patches and a vitreous to slightly dull luster. Trigonal crystal structure, but this fragment shows no obvious cleavage and has irregular fracture.
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Physical properties
Hardness 7 Mohs; white to translucent with rusty yellow-brown patches and a vitreous to slightly dull luster. Trigonal crystal structure, but this fragment shows no obvious cleavage and has irregular fracture.
Formation & geological history
Quartz commonly crystallizes from silica-rich hydrothermal fluids or late-stage magma; iron oxides can stain it during weathering. The specimen’s age and exact formation setting cannot be determined from the image.
Uses & applications
Quartz is used in glass, electronics, and construction; attractive pieces may be kept as inexpensive mineral specimens.
Geological facts
Quartz is among Earth’s most abundant minerals and can resist weathering long after surrounding rock breaks down.
Field identification & locations
Look for glassy translucence, hardness sufficient to scratch glass, and lack of cleavage; iron staining often appears as rusty surface spots. Quartz occurs worldwide in veins, pegmatites, and many rock types.
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Undetermined; the image is too blurry for reliable identification
mineral