mineral

Iron-stained quartz rock

Quartz (SiO₂), likely ferruginous quartz or quartz-rich breccia

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent gray quartz with orange-brown iron-oxide staining, vitreous to dull luster, massive granular texture, and no obvious cleavage. The irregular cavities and rusty matrix suggest quartz vein material or brecciation.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich hydrothermal fluids filled fractures, followed by oxidation of included iron-bearing minerals; exact age and locality cannot be determined from the image. It may also represent quartz-rich vein breccia or weathered chalcedonic material.

Uses & applications

Used as a collector specimen, decorative stone, and occasionally as a source or indicator of metal-bearing veins; generally unsuitable for gemstone cutting unless translucent areas are attractive.

Geological facts

Quartz commonly forms in hydrothermal veins and can preserve pockets, crusts, or drusy crystals. Iron oxides such as limonite and hematite produce the characteristic rust-red to brown coloration.

Field identification & locations

Identify by its glassy translucent areas, very high hardness, and inability to scratch it with a steel knife; quartz should scratch ordinary glass. Common in mineralized veins, metamorphic terrains, and weathered igneous rocks.