mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: typically white, clear, or tan; Luster: Vitreous/glassy; Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture.

Hardness: 7 on Mohs scale
Color: typically white, clear, or tan
Luster: Vitreous/glassy

Identified May 24, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: typically white, clear, or tan; Luster: Vitreous/glassy; Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture.

Formation & geological history

Formed via precipitation of mineral-rich water within a hollow cavity or gas bubble in volcanic or sedimentary rocks over thousands to millions of years.

Uses & applications

Primarily used for interior decoration, specimen collecting, metaphysical practices, and occasionally in lapidary for jewelry or trinkets.

Geological facts

Geodes are essentially 'rock bubbles' that often look like ordinary stones from the outside but contain hollow centers lined with sparkling crystals.

Field identification & locations

Identified in the field by their rounded, lumpy appearance and unusual lightness compared to solid rocks. Common in desert environments and limestone beds.