mineral
Limonite-stained Quartz
Silicon dioxide with iron oxide hydroxide, SiO2 + FeO(OH)·nH2O
AI-generated identification · may be incorrectHardness of 7 for quartz and 4-5.5 for limonite; yellowish-brown to orange color; vitreous to earthy luster; hexagonal crystal system.
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Physical properties
Hardness of 7 for quartz and 4-5.5 for limonite; yellowish-brown to orange color; vitreous to earthy luster; hexagonal crystal system.
Formation & geological history
Formed through hydrothermal processes and subsequent surface weathering where iron-rich solutions coat quartz fractures.
Uses & applications
Used as mineral specimens for collectors and occasionally in lapidary arts.
Geological facts
Limonite staining is a common weathering product that gives rocks a distinctive rusty appearance.
Field identification & locations
Identify by its hardness scratching glass and its bright orange-yellow earthy coating.
