mineral

Quartz with Iron Oxide

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: White, clear, with yellow to brown iron staining. Luster: Vitreous to greasy. Crystal structure: Trigonal.

Hardness: 7 on Mohs scale
Color: White, clear, with yellow to brown iron staining
Luster: Vitreous to greasy

Identified July 28, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White, clear, with yellow to brown iron staining. Luster: Vitreous to greasy. Crystal structure: Trigonal.

Formation & geological history

Formed in hydrothermal veins and pegmatites, often subjected to weathering where iron-rich groundwater stains the crystal surfaces over millions of years.

Uses & applications

Used in crystal collecting, lapidary arts, decorative items, and sometimes as low-grade quartz aggregate.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties.

Field identification & locations

Identified by its high hardness (scratches glass), lack of cleavage, and characteristic conchoidal fracture. Commonly found worldwide in various geological settings.