mineral
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 7 (Quartz) to 3 (Calcite); Color: Pale pink, orange-tan, or colorless; Luster: Vitreous to greasy; Structure: Hexagonal crystals; Cleavage: None/Conchoidal.
- Hardness
- 7 (Quartz) to 3 (Calcite)
- Color
- Pale pink, orange-tan, or colorless
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 (Quartz) to 3 (Calcite); Color: Pale pink, orange-tan, or colorless; Luster: Vitreous to greasy; Structure: Hexagonal crystals; Cleavage: None/Conchoidal.
Formation & geological history
Formed as secondary mineral precipitates in hollow cavities of igneous or sedimentary rocks via hydrothermal fluids or groundwater over millions of years.
Uses & applications
Primarily used as decorative display specimens, for geological education, and in the metaphysical/collecting market.
Geological facts
The pinkish-orange hue is often caused by micro-inclusions of iron oxides (hematite) or specific impurities during the crystallization process.
Field identification & locations
Identify by its crystalline surface within a rough matrix. Found globally, notably in the Midwestern US (Keokuk), Morocco, and Brazil. Resistant to scratching with steel if high-quartz content.
