mineral
Likely quartz-rich rock fragment
Quartz (SiO₂), possibly iron-stained or mixed with feldspar
AI-generated identification · may be incorrectSmall, opaque cream-to-tan fragment with a dull to slightly glassy luster and irregular fracture; hardness around 7 if predominantly quartz. Crystal structure is trigonal; no obvious cleavage is visible.
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Physical properties
Small, opaque cream-to-tan fragment with a dull to slightly glassy luster and irregular fracture; hardness around 7 if predominantly quartz. Crystal structure is trigonal; no obvious cleavage is visible.
Formation & geological history
Quartz commonly forms as magma cools or from silica-rich fluids in veins, and also occurs in weathered sedimentary rocks; its age cannot be determined from the image.
Uses & applications
Quartz is used in glass, ceramics, electronics, and construction aggregate; this unworked fragment has little commercial or jewelry value.
Geological facts
Quartz is one of Earth’s most abundant minerals and resists chemical weathering, so it often accumulates in soils and stream gravels.
Field identification & locations
Look for a glassy appearance, hardness sufficient to scratch ordinary glass, and lack of cleavage; the photo is not detailed enough to distinguish quartz from a quartz-rich rock or other pale mineral.
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