mineral

Ferruginous Quartz

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Rusty orange-red to reddish-brown; Luster: Vitreous (glassy) to dull; Crystal structure: Trigonal; Cleavage: None/Conchoidal fracture.

Hardness: 7 on Mohs scale
Color: Rusty orange-red to reddish-brown
Luster: Vitreous (glassy) to dull

Identified July 5, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Rusty orange-red to reddish-brown; Luster: Vitreous (glassy) to dull; Crystal structure: Trigonal; Cleavage: None/Conchoidal fracture.

Formation & geological history

Formed when iron oxides like hematite or limonite coat or are included within quartz crystals during primary formation or via secondary hydrothermal staining. Commonly found in sedimentary deposits and hydrothermal veins.

Uses & applications

Used as a decorative lapidary material, for crystal healing specimen collecting, and occasionally as a source of iron if found in massive deposits.

Geological facts

Also known as 'Hematoid Quartz,' the red coloration is internal or a surface coating caused by iron oxide. It combines the properties of quartz and hematite.

Field identification & locations

Identify by its hardness (will scratch glass) and its signature rusty red coloration which may be patchy or concentrated in certain crystal zones. Commonly found in iron-rich geological regions worldwide.