mineral

Iron-stained quartz or quartz-rich rock

Quartz (SiO₂), possibly limonite/goethite-stained quartzite or breccia

AI-generated identification · may be incorrect

Pale cream to brown, translucent-to-opaque material with a glassy to dull luster and rusty iron-oxide staining; quartz hardness is about 7 Mohs, with no cleavage and conchoidal fracture. The blurred image does not resolve crystal form or texture reliably.

Identified August 14, 2026More mineral →

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Physical properties

Formation & geological history

Likely quartz formed in a hydrothermal vein or quartz-rich metamorphic rock, later stained by oxidation of iron-bearing minerals; exact age and setting cannot be determined visually. Common formation ages range from Precambrian to recent vein deposits.

Uses & applications

Quartz-rich material is used for silica, abrasives, glass, and construction aggregate; attractive pieces may be collected or used decoratively. This small irregular specimen has modest commercial value.

Geological facts

Brown-red coloration commonly comes from limonite or goethite coatings rather than the quartz itself. A steel file should not scratch fresh quartz, while quartz can scratch ordinary glass.

Field identification & locations

Common in hydrothermal veins, weathered quartz deposits, and quartzite terrains worldwide. Confirm with a hardness test, streak test on an uncoated surface, and close inspection for crystalline quartz or granular quartzite texture.