mineral

Red Quartz

Silicon Dioxide (SiO2) with Hematite inclusions

Hardness: 7 on Mohs scale; Color: Reddish-brown to orange-red; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Reddish-brown to orange-red
Luster: Vitreous to greasy

Identified June 6, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Reddish-brown to orange-red; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in hydrothermal veins or igneous rocks where iron oxides (like hematite or goethite) are present during the crystallization of silica-rich fluids. Common in Precambrian through Tertiary formations.

Uses & applications

Used primarily for lapidary work, decorative specimens, and metaphysical collecting. Industrially, quartz is used in glassmaking and electronics.

Geological facts

The red color is usually caused by a thin coating or internal inclusions of specularite or hematite. It is often nickname 'Hematoid Quartz' or 'Ferruginous Quartz'.

Field identification & locations

Identified by its extreme hardness (cannot be scratched by steel) and lack of cleavage. Look for characteristic conchoidal fracture patterns and the distinct red staining on or within translucent crystals.

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Arenite (SiO2 based)

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