Rock Identifier
Quartz with Iron Oxide Inclusions (SiO2) — mineral
mineral

Quartz with Iron Oxide Inclusions

SiO2

AI-generated identification · may be incorrect

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.

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.

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