Quartz with Iron Staining

Physical Properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent with brown/yellow/red iron staining; Luster: Vitreous; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & Geological History

Formed through hydrothermal processes, where silica-rich fluids crystallize in veins or cavities. The brown staining occurs later through the oxidation of iron-rich minerals (limonite/hematite) or contact with groundwater.

Uses & Applications

Common quartz is used in construction as aggregate, in glassmaking, and electronics. Stained specimens are primarily for amateur mineral collecting or as garden stones.

Geological Facts

Quartz is the second most abundant mineral in the Earth's continental crust. These specific iron-stained pieces are often colloquially called 'Golden Healer' in metaphysical communities, though geologically it is simple oxidation.

Field Identification & Locations

Identify by its ability to scratch glass (hardness 7) and its lack of cleavage. It is extremely common worldwide, especially in mountain ranges and streambeds where erosion has exposed silica veins.

Identified on: 4/26/2026

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