mineral
Milky quartz in host rock
Quartz (SiO₂), likely a quartz vein or quartz-rich fragment
AI-generated identification · may be incorrectWhite to translucent, glassy-to-dull luster, massive crystalline texture, and no visible cleavage; quartz hardness is 7 on the Mohs scale. The gray-brown material appears to be an unidentified host rock.
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Physical properties
White to translucent, glassy-to-dull luster, massive crystalline texture, and no visible cleavage; quartz hardness is 7 on the Mohs scale. The gray-brown material appears to be an unidentified host rock.
Formation & geological history
Quartz commonly crystallizes from silica-rich hydrothermal fluids in fractures and veins; the image does not allow the host rock or geological age to be determined.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and decorative stone; this rough fragment is mainly of modest collector interest.
Geological facts
Milky color results from tiny fluid or gas inclusions that scatter light.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and irregular to conchoidal fracture. Quartz veins occur in many rock types worldwide; the specimen’s locality would help refine identification.
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