mineral
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 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
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Physical properties
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.
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.
