mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)

Hardness: 7 (Mohs scale); Color: Milky white with orange/yellow iron staining; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 (Mohs scale)
Color: Milky white with orange/yellow iron staining
Luster: Vitreous to waxy

Identified March 22, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Milky white with orange/yellow iron staining; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal fluids in veins or cavities. The orange-yellow tint is caused by secondary oxidation of iron-bearing minerals (like pyrite) that leach iron oxides into the quartz fractures. This specimen appears water-worn, likely from a river or beach environment.

Uses & applications

Primarily used as decorative stones, in landscaping, or as tumbling rough for hobbyists. High-purity quartz is used in glass making and electronics, though stained specimens are less desirable for industrial use.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Iron-stained quartz is sometimes colloquially, though inaccurately, referred to as 'Golden Healer' in metaphysical circles.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), its lack of cleavage, and the characteristic rusty staining that doesn't wash off. Found globally in almost every geological environment, especially in gravel beds and mountain streams.

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