mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: Pinkish-orange to rusty red; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- Pinkish-orange to rusty red
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 (Mohs scale); Color: Pinkish-orange to rusty red; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed from cooling magma or hydrothermal veins. The reddish-tan coloration is due to the presence of secondary iron oxide (rust) coating the surfaces or internal fractures of the quartz.
Uses & applications
Mainly for collection, lapidary use for tumbling, and occasionally as a source of high-purity silica for glassmaking or electronics if refined.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Iron-stained versions are often colloquially called 'Ferruginous Quartz' or 'Healer's Gold' in metaphysical circles.
Field identification & locations
Identify in the field by its hardness (it will scratch glass) and lack of cleavage. Look for the reddish staining in riverbeds, mountain outcrops, and mining tailings.
