Quartz Geode

Physical Properties

Hardness: 7; Color: White to colorless; Luster: Vitreous/glassy; Structure: Hexagonal crystals growing inward; Specific Gravity: 2.65.

Formation & Geological History

Formed when mineral-rich groundwater seeps into hollow cavities in sedimentary or volcanic rock, slowly precipitating crystals over millions of years.

Uses & Applications

Decorative display pieces, metaphysical collecting, gemology education, and occasionally source material for industrial silica.

Geological Facts

The word geode comes from the Greek word 'Geoides' meaning earth-like. No two geodes are exactly alike on the inside.

Field Identification & Locations

Identify in the field by looking for rounded, lumpy stones that feel unusually lightweight for their size; common in desert regions like Morocco, Mexico, and the Midwestern US.

Identified on: 5/19/2026

Mode: Standard