mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs), Color: White to pink/reddish due to iron oxide impurities, Luster: Vitreous to greasy, Crystal Structure: Hexagonal/Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified July 21, 2026More mineral →

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Physical properties

Formation & geological history

Forms in a wide variety of environments, most commonly from the cooling of magma or hydrothermal veins. This specimen likely weathered from a larger vein and became water-worn or tumbled.

Uses & applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as a gemstone or collector specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Iron-stained quartz is often mistaken for rose quartz, but the color is often patchy or surface-level rather than consistent throughout the crystal lattice.

Field identification & locations

Identify by its hardness (it will easily scratch glass) and lack of cleavage. Look for it in riverbeds, gravel pits, and mountain trails. It is ubiquitous worldwide.