mineral
Orange Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale; Color: bright orange to pale yellow; Luster: vitreous to waxy/pearly; Crystal structure: trigonal (often rhombohedral cleavage); Specific gravity: 2.71
- Hardness
- 3 on Mohs scale
- Color
- bright orange to pale yellow
- Luster
- vitreous to waxy/pearly
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Physical properties
Hardness: 3 on Mohs scale; Color: bright orange to pale yellow; Luster: vitreous to waxy/pearly; Crystal structure: trigonal (often rhombohedral cleavage); Specific gravity: 2.71
Formation & geological history
Formed through sedimentary processes, often as a precipitate from calcium-rich groundwater in caves or hot springs, or in marine environments. The orange color is typically due to hematite or iron oxide inclusions.
Uses & applications
Used in ornamental carvings, decorative items, lapidary work, and as a calcium source in chemical industries.
Geological facts
Calcite is one of the most common minerals on Earth. It has a unique optical property called double refraction, where light rays are split into two when passing through a clear specimen.
Field identification & locations
Can be identified by its softness (can be scratched by a copper coin) and its reaction to dilute hydrochloric acid (it will effervesce or fizz). Commonly found in Mexico and Brazil.
