igneous
Quartz-rich rock, likely milky quartz vein material
Predominantly quartz (SiO₂); exact rock type cannot be confirmed visually
AI-generated identification · may be incorrectCream to tan, opaque, rough and massive with a dull to vitreous luster; quartz has Mohs hardness 7, trigonal crystal structure, and no cleavage. The specimen appears fractured and possibly weathered; hardness and composition are not verifiable from the image.
Identified More igneous →
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Physical properties
Cream to tan, opaque, rough and massive with a dull to vitreous luster; quartz has Mohs hardness 7, trigonal crystal structure, and no cleavage. The specimen appears fractured and possibly weathered; hardness and composition are not verifiable from the image.
Formation & geological history
Quartz commonly precipitates from silica-rich hydrothermal fluids in fractures, or forms in silica-rich veins; such veins occur in rocks of many ages. The image does not establish its specific origin or age.
Uses & applications
Quartz-rich material is used as silica feedstock and aggregate; attractive pieces may be kept as inexpensive mineral specimens.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly forms veins cutting through other rocks.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and irregular fracture; common worldwide in veins and pegmatites. The tan surface may reflect staining or weathering.
