mineral

Iron-stained milky quartz

Quartz (SiO₂), with reddish-brown iron-oxide staining, likely hematite and/or goethite

AI-generated identification · may be incorrect

Mostly white to translucent, with a vitreous luster and irregular fracture; quartz hardness is Mohs 7 and its crystal structure is trigonal. The rusty coating is softer and earthy, unlike the quartz.

Identified October 6, 2026More mineral →

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Physical properties

Mostly white to translucent, with a vitreous luster and irregular fracture; quartz hardness is Mohs 7 and its crystal structure is trigonal. The rusty coating is softer and earthy, unlike the quartz.

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and pegmatites; later weathering can deposit iron oxides on its surface. The image alone cannot establish the specimen’s geological age.

Uses & applications

Commonly collected as a display specimen; quartz is also used in glass, electronics, and construction materials. This rough, stained piece is not typically gem-grade.

Geological facts

The red-orange color is likely iron-oxide staining rather than the quartz itself. Quartz has no cleavage and breaks with a curved, conchoidal fracture.

Field identification & locations

Look for glassy or translucent white areas, hardness sufficient to scratch glass, and no obvious cleavage; rusty patches may rub off or vary in hardness. Quartz is widespread worldwide, especially in veins and pegmatites.