mineral
Milky quartz with iron staining
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectLikely massive, opaque to translucent white quartz with rusty-brown iron-oxide staining. Quartz has Mohs hardness 7, vitreous luster, trigonal crystal structure, no cleavage, and specific gravity about 2.65; the photo alone cannot confirm the identification.
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Physical properties
Likely massive, opaque to translucent white quartz with rusty-brown iron-oxide staining. Quartz has Mohs hardness 7, vitreous luster, trigonal crystal structure, no cleavage, and specific gravity about 2.65; the photo alone cannot confirm the identification.
Formation & geological history
Quartz commonly forms when silica-rich fluids fill fractures or when magma cools; iron oxides can stain it brown. It occurs in rocks of many ages and geological settings.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and decorative objects; attractive pieces may be collected or polished.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly forms veins in surrounding rock.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch ordinary glass, and irregular fracture rather than cleavage. Common worldwide in veins, pegmatites, and many sedimentary and metamorphic rocks.
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