mineral
Iron-stained milky quartz vein
Quartz (SiO₂), with reddish iron-oxide staining, likely hematite or goethite
AI-generated identification · may be incorrectMostly opaque white to translucent, with a glassy-to-waxy luster and rusty red-orange vein coatings. Quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65.
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Physical properties
Mostly opaque white to translucent, with a glassy-to-waxy luster and rusty red-orange vein coatings. Quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65.
Formation & geological history
Likely a quartz vein formed when silica-rich fluids filled fractures in surrounding rock and crystallized; iron oxides later stained the fractures. The image alone cannot establish its age or exact setting.
Uses & applications
Quartz is used in glass, ceramics, electronics, and decorative stone; this specimen is mainly suitable for collecting or display.
Geological facts
The dark host rock and white vein suggest a fracture-filling vein, but the host rock cannot be identified confidently from the visible portion.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and irregular conchoidal fracture; red streaks commonly reflect iron oxides. Quartz veins occur worldwide in igneous, metamorphic, and sedimentary terrains.
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