mineral
Quartz with Iron Oxide Inclusions
SiO2
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: Translucent to opaque with orange/red/brown patches due to iron oxide. Luster: Vitreous to waxy. Crystal structure: Trigonal. Cleavage: Indiscernible. Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale. Color: Translucent to opaque with orange/red/brown patches due to iron oxide. Luster: Vitreous to waxy. Crystal structure: Trigonal. Cleavage: Indiscernible. Specific gravity: 2.65.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments. The orange/red coloration is typically due to hematite or other iron oxides staining the quartz during or after formation.
Uses & applications
Used as a decorative stone, tumbled stone for collectors, and sometimes in inexpensive jewelry.
Geological facts
Quartz is one of the most abundant minerals in the Earth's crust. When it contains iron inclusions, it is often referred to as 'ferruginous quartz'.
Field identification & locations
Identified by its hardness (scratches glass) and conchoidal fracture. Commonly found worldwide in riverbeds, beaches, and glacial till as rounded pebbles.
