mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Ferric Iron Oxides

Hardness: 7 on Mohs scale. Color: Clear to white crystals with orange/brown staining. Luster: Vitreous (glassy). Crystal Structure: Hexagonal (trigonal system). Cleavage: None (conchoidal fracture).

Hardness: 7 on Mohs scale
Color: Clear to white crystals with orange/brown staining
Luster: Vitreous (glassy)

Identified June 16, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Clear to white crystals with orange/brown staining. Luster: Vitreous (glassy). Crystal Structure: Hexagonal (trigonal system). Cleavage: None (conchoidal fracture).

Formation & geological history

Forms in hydrothermal veins or cavities within various rock types. The iron staining occurs when groundwater rich in iron oxide (limonite or hematite) coats the surfaces or penetrates micro-fractures in the quartz.

Uses & applications

Commonly used as decorative specimens, in jewelry as 'Sun-baked' or 'Tangerine' quartz, and in high volumes for the production of silicon, glass, and electronics.

Geological facts

Iron-stained quartz is colloquially known among some collectors as 'golden healer' or 'limonite quartz' depending on the depth and color of the coating. The staining is purely superficial and can often be removed with oxalic acid.

Field identification & locations

Identify in the field by its six-sided crystal faces and its ability to scratch glass easily. Look for these in rocky outcrops, dry creek beds, or around mine tailings. Found globally in almost all geological environments.

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