mineral

Ferruginous Quartz

Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Milky white to reddish-orange; Luster: Vitreous to dull; Crystal structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65-2.73

Hardness: 7 on Mohs scale
Color: Milky white to reddish-orange
Luster: Vitreous to dull

Identified July 11, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to reddish-orange; Luster: Vitreous to dull; Crystal structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65-2.73

Formation & geological history

Formed in hydrothermal veins or as sedimentary deposits where iron oxide (hematite or limonite) coats or includes within quartz crystals during growth.

Uses & applications

Primarily used as a mineral specimen for collectors, decorative landscaping, and occasionally for healing crystal practices.

Geological facts

The red-orange color is caused by the presence of iron oxide (rust). When the iron is included inside the crystal, it is called hematoid quartz.

Field identification & locations

Can be identified in the field by its hardness (will scratch glass) and the characteristic rusty orange staining on a white silica base. Commonly found in areas with high iron concentrations in the soil or bedrock.