mineral
Likely iron-stained quartz
Quartz (SiO₂), possibly colored by iron-oxide inclusions or surface staining
AI-generated identification · may be incorrectSmall rough, translucent honey-brown specimen with a glassy-to-dull luster and irregular fracture; quartz has Mohs hardness 7 and a hexagonal crystal system, with no cleavage. The photo does not show enough detail for a definitive identification.
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Physical properties
Small rough, translucent honey-brown specimen with a glassy-to-dull luster and irregular fracture; quartz has Mohs hardness 7 and a hexagonal crystal system, with no cleavage. The photo does not show enough detail for a definitive identification.
Formation & geological history
Quartz forms in igneous and metamorphic rocks and in mineral-filled veins, commonly crystallizing from silica-rich fluids. Its age depends on the host deposit and cannot be determined from the image.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and jewelry; this small rough piece is mainly suitable for collecting.
Geological facts
Iron oxides commonly stain otherwise colorless quartz yellow, brown, or reddish, sometimes unevenly along fractures.
Field identification & locations
A hardness test on an inconspicuous spot can help distinguish quartz: it should scratch ordinary glass. Common worldwide; confirm identity with close inspection for crystal faces and fracture texture.
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