mineral

Iron-stained quartz with possible feldspar

Quartz (SiO₂), likely with limonite/goethite staining and minor feldspar or mica

AI-generated identification · may be incorrect

Hardness about 7 for quartz; translucent gray-white to orange-brown, vitreous luster, massive/granular texture, and no obvious cleavage. The orange color is likely iron-oxide staining rather than a distinct crystal species.

Identified September 8, 2026More mineral →

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Physical properties

Formation & geological history

Probably a hydrothermal or pegmatitic vein fragment, later weathered and oxidized near the surface; its precise geological age cannot be determined from the photograph. Commonly forms in igneous and metamorphic terrains.

Uses & applications

Mostly a low-value collecting specimen; quartz is widely used in glass, abrasives, foundry materials, electronics, and engineered stone. Iron-stained pieces may be attractive but are generally not gem quality.

Geological facts

Quartz commonly resists weathering while surrounding minerals decompose, leaving rounded vein fragments. Orange coatings may be limonite, a mixture dominated by hydrated iron oxides.

Field identification & locations

Look for glassy luster, conchoidal fracture, and inability to scratch with a steel knife; quartz should scratch ordinary glass. Confirm with hardness and streak tests, since similar iron-stained feldspar is softer.