mineral
Orange Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale; Color: Orange to honey-gold; Luster: Vitreous to waxy; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71
- Hardness
- 3 on Mohs scale
- Color
- Orange to honey-gold
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 3 on Mohs scale; Color: Orange to honey-gold; Luster: Vitreous to waxy; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71
Formation & geological history
Formed through sedimentary processes, often precipitating from calcium-rich solutions in marine environments or through hydrothermal activity. It is found in massive form within limestone and marble deposits.
Uses & applications
Mainly used as a decorative stone, in lapidary work for carvings and spheres, and highly popular in the metaphysical and gem collecting communities.
Geological facts
Orange calcite is known for its 'acid-washed' or waxy feel when polished. It is often used as a source of calcium in industrial applications and is highly sensitive to acids, which will cause it to effervesce.
Field identification & locations
Identify by its orange color, distinct rhombohedral cleavage planes, and low hardness (it can be scratched by a copper penny). It is commonly found in Mexico, Brazil, and the USA (Utah).
