mineral

Quartz Geode with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: Clear to white quartz with yellowish-brown iron staining; Luster: Vitreous to dull; Crystal structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 Mohs
Color: Clear to white quartz with yellowish-brown iron staining
Luster: Vitreous to dull

Identified July 13, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Clear to white quartz with yellowish-brown iron staining; Luster: Vitreous to dull; Crystal structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed in cavities within volcanic or sedimentary rocks where mineral-rich hydrothermal fluids precipitate crystals over thousands of years. The yellow-orange tint is caused by iron oxides (limonite/hematite) leaching into the specimen.

Uses & applications

Primarily used as a collector's specimen, educational tool, or decorative piece. High-purity quartz is used in electronics and glass manufacturing.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. These specific specimens are nicknamed 'Golden Quartz' or 'Limonitic Quartz' because of their iron-rich coloring.

Field identification & locations

Identify by the presence of small crystalline faces (druzy) and its ability to scratch glass. Commonly found in desert regions or areas with high volcanic history. Look for round or lumpy nodules that feel lighter than they look, suggesting a hollow interior.