mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Colorless to white; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Colorless to white
Luster: Vitreous

Identified July 10, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to white; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed when minerals precipitate from hydrothermal fluids into hollow cavities within sedimentary or volcanic rocks. Usually found in limestone or volcanic ash beds.

Uses & applications

Commonly used as decorative specimens, for educational purposes, in crystal healing practices, and as a popular entry-level item for rock collectors.

Geological facts

Geodes are often indistinguishable from ordinary rocks on the outside; their hollow, crystal-filled interiors are only revealed once they are cracked open.

Field identification & locations

Identified by a lumpy, cauliflower-like exterior and a hollow center containing visible crystals. Commonly found in desert regions or areas with limestone bedrock.