mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: Yellow-orange to rusty brown; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- Yellow-orange to rusty brown
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Mohs scale); Color: Yellow-orange to rusty brown; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or as a secondary mineral in sedimentary deposits where iron-rich groundwater stains preexisting quartz. These can range from millions to billions of years old.
Uses & applications
Mostly used for mineral collecting and metaphysical practices. Higher quality specimens may be tumbled or cut into beads for jewelry.
Geological facts
Also known as 'Hematoid Quartz' or 'Golden Healer' in the gem trade. The orange color is caused by microscopic deposits of hematite or limonite within the quartz lattice or surface cracks.
Field identification & locations
Identify in the field by its hardness (it should scratch glass) and its characteristic iron staining that cannot be easily washed off. Commonly found in riverbeds, quarries, and mountain ranges globally.
