mineral
Quartz with Iron Inclusions
SiO2
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: Clear, white, or cloudy with red, orange, or brown staining from iron oxide. Luster: Vitreous (glassy). Crystal structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale. Color: Clear, white, or cloudy with red, orange, or brown staining from iron oxide. Luster: Vitreous (glassy). Crystal structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary rocks. The iron inclusions (hematite or limonite) form during crystallization or are introduced later through fluids.
Uses & applications
Collected for its aesthetic appeal, sometimes used in lapidary for cabochons or tumbled stones.
Geological facts
Quartz is one of the most abundant minerals on Earth's surface. The presence of iron gives it a distinctive 'rusty' appearance, often referred to as 'hematoid quartz' or 'ferruginous quartz'.
Field identification & locations
Identified by its hardness (scratches glass), glassy luster, and the characteristic red/orange staining. Commonly found in riverbeds, beaches, and quartz veins globally.
