mineral
Milky quartz vein rock
Quartz (SiO₂), likely massive vein quartz with minor iron staining
AI-generated identification · may be incorrectHardness 7 Mohs; white to translucent gray-brown, vitreous to dull luster, hexagonal crystal structure, no cleavage and uneven fracture. The specimen appears massive and fractured rather than a single crystal.
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Physical properties
Hardness 7 Mohs; white to translucent gray-brown, vitreous to dull luster, hexagonal crystal structure, no cleavage and uneven fracture. The specimen appears massive and fractured rather than a single crystal.
Formation & geological history
Quartz precipitated from silica-rich hydrothermal fluids in fractures in older bedrock; vein formation can occur across many geological ages. Exact age and host rock cannot be determined from the image.
Uses & applications
Quartz is used in glass, electronics, abrasives, and as a decorative or collecting specimen; this rough piece has little obvious gem value.
Geological facts
Quartz is among Earth’s most abundant minerals and commonly fills cracks as veins.
Field identification & locations
Look for glassy surfaces, hardness sufficient to scratch ordinary glass, and lack of cleavage; it occurs widely in veins and pegmatites. The image suggests quartz, but a definitive identification needs physical testing.
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