igneous
Quartz-rich rock, likely milky quartz vein material
Predominantly quartz (SiO₂); exact rock type cannot be confirmed from the photograph
AI-generated identification · may be incorrectOpaque to translucent gray-white, uneven massive texture, and vitreous to dull luster with rusty and dark inclusions. Quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage; the specimen’s size and weight are not available to assess.
Identified More igneous →
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Physical properties
Opaque to translucent gray-white, uneven massive texture, and vitreous to dull luster with rusty and dark inclusions. Quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage; the specimen’s size and weight are not available to assess.
Formation & geological history
May be quartz deposited from silica-rich fluids in fractures, later broken from its host rock; such veins formed across many geological periods. The image does not show enough context to determine age or confirm a vein origin.
Uses & applications
Common quartz is used in glass and silicon production and as a decorative or collecting specimen; this rough piece appears to have limited gem or ornamental value.
Geological facts
Quartz is among Earth’s most abundant minerals. Its lack of cleavage and hardness help distinguish it from many pale minerals.
Field identification & locations
Look for hardness sufficient to scratch glass and irregular, curved fracture surfaces rather than cleavage planes; rusty patches may be iron-oxide staining. Quartz veins occur worldwide, but locality information is needed for a more precise identification.
