mineral

Quartz Geode (Druzy Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: Pale pinkish-peach to tan/beige interior druzy crystals with a dark brown/gray rock matrix. Luster: Vitreous to dull. Crystal structure: Hexagonal/Trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Luster: Vitreous to dull

Identified July 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cavities (vugs) within volcanic or sedimentary rocks when mineral-rich hydrothermal fluids seeped into hollow spaces and precipitated tiny quartz crystals over time, creating a druzy/botryoidal surface structure.

Uses & applications

Popular as display specimens for rock and mineral collectors, ornamental decor, and used in lapidary arts or holistic/metaphysical practices.

Geological facts

The sparkling surface consists of thousands of microscopic, tightly packed quartz terminations known as a druzy coating. The peach-tan coloration often comes from trace inclusions of iron oxides or clay minerals.

Field identification & locations

Identify by its hollow vug structure filled with micro-crystalline sparkling quartz growth attached to a rough, weathering-resistant matrix. Commonly found in regions with ancient volcanic activity or limestone Karst topographies like Missouri, Iowa, Brazil, and Mexico.