mineral
Iron-rich quartz pebble
Quartz (SiO₂) with iron-oxide staining or inclusions; exact identification is uncertain from the photo
AI-generated identification · may be incorrectSmall, irregular, brown-gray specimen with a glassy to dull luster and possible translucent quartz patches. Quartz has Mohs hardness 7 and a trigonal crystal structure; no obvious cleavage, with uneven fracture.
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Physical properties
Small, irregular, brown-gray specimen with a glassy to dull luster and possible translucent quartz patches. Quartz has Mohs hardness 7 and a trigonal crystal structure; no obvious cleavage, with uneven fracture.
Formation & geological history
Likely a naturally weathered quartz-rich pebble, colored by iron oxides; its age and original host rock cannot be determined visually. Quartz forms in many igneous, metamorphic, and sedimentary settings.
Uses & applications
Commonly collected as a curiosity or used decoratively; this small specimen has no evident industrial or jewelry-grade use.
Geological facts
Iron oxides such as hematite or goethite commonly stain quartz brown or reddish, though the visible color alone cannot confirm the minerals present.
Field identification & locations
A hardness or streak test and close inspection for quartz’s glassy fracture could help identify it; quartz pebbles occur worldwide in river and beach gravels. Avoid destructive testing if preserving it.
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