metamorphic
Iron-stained quartz-rich rock
Quartz-rich vein rock, possibly iron-oxide-stained quartzite or brecciated quartz
AI-generated identification · may be incorrectMostly white to translucent quartz with rusty-red and golden-brown iron-oxide staining; vitreous to dull luster, uneven fracture, and no obvious cleavage. Quartz hardness is 7 Mohs; the specimen’s exact texture and composition cannot be confirmed from the image alone.
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Physical properties
Mostly white to translucent quartz with rusty-red and golden-brown iron-oxide staining; vitreous to dull luster, uneven fracture, and no obvious cleavage. Quartz hardness is 7 Mohs; the specimen’s exact texture and composition cannot be confirmed from the image alone.
Formation & geological history
Likely formed from silica-rich fluids filling fractures, with later iron-oxide staining; the age and precise geological setting are unknown from appearance alone.
Uses & applications
Quartz-rich material is used for silica, aggregates, and decorative stone; this small rough piece is mainly suitable for collecting.
Geological facts
The red-brown coloration commonly comes from hematite, while yellow-brown staining may be goethite or limonite.
Field identification & locations
Look for hard, glassy quartz grains or veins and rusty staining; quartz will scratch glass. Similar material occurs in hydrothermal veins and iron-stained outcrops worldwide.
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