mineral
Quartz with iron staining
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7, Color: White to transparent with rusty orange/brown iron staining, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
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Physical properties
Hardness: 7, Color: White to transparent with rusty orange/brown iron staining, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Forms in a wide variety of igneous, metamorphic, and sedimentary environments. Often found in hydrothermal veins. The iron staining is secondary, formed from the weathering of iron-bearing minerals.
Uses & applications
Quartz is used in glassmaking, electronics, construction, and as a gemstone. This particular piece is likely just a curiosity or landscape rock.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The iron staining is very common in surface-collected quartz.
Field identification & locations
Identify by its hardness (scratches glass) and conchoidal fracture. Common worldwide.
