mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless to white with reddish-orange iron oxide staining; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Colorless to white with reddish-orange iron oxide staining
Luster: Vitreous (glassy)

Identified March 9, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. This specimen likely formed in a hydrothermal environment where silica-rich fluids cooled in crustal fractures. The reddish staining occurs later due to the oxidation of iron-bearing minerals (like hematite or goethite) deposited in micro-cracks.

Uses & applications

Used in glassmaking, abrasives, and electronics (due to piezoelectric properties). Stained specimens like this are common in beginner rock collections or used as garden landscaping stones.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. The iron staining seen here is often referred to as 'golden healer' by metaphysical collectors, though geologically it is simply surface oxidation.

Field identification & locations

Identify in the field by its ability to scratch glass and its lack of cleavage (it breaks into irregular, sharp shards). Found globally, especially in mountain ranges and riverbeds. It is a 'primary' mineral used by geologists to determine the history of geological fluids.