mineral

Quartz Geode Fragment with Iron Staining

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: Clear to white with reddish-brown iron oxide; Luster: Vitreous to greasy; Crystal Structure: Hexagonal/Trigonal; Cleavage: None/Conchoidal fracture.

Hardness: 7 (Mohs scale)
Color: Clear to white with reddish-brown iron oxide
Luster: Vitreous to greasy

Identified June 2, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Clear to white with reddish-brown iron oxide; Luster: Vitreous to greasy; Crystal Structure: Hexagonal/Trigonal; Cleavage: None/Conchoidal fracture.

Formation & geological history

Formed through hydrothermal processes or gas bubbles in volcanic rock where silica-rich fluids precipitated over time. The iron staining occurs from groundwater infiltration containing hematite or goethite.

Uses & applications

Primarily used for mineral collecting, lapidary work (tumbling), and as decorative ornaments. High-purity quartz is used in electronics and glass manufacturing.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Iron-stained quartz is often called 'Ferruginous Quartz' or 'Hematoid Quartz' when the red color is integrated.

Field identification & locations

Identify by its hardness (scratches glass), hexagonal crystal habits, and lack of cleavage. Common in many geological environments worldwide, especially in desert or mountainous regions.