mineral

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Hardness: 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

Identified March 1, 2026More mineral →

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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.

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