mineral
Orange Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale. Color: Orange to honey-yellow. Luster: Vitreous to waxy. Crystal system: Trigonal. Cleavage: Perfect rhombohedral in three directions.
- Hardness
- 3 on Mohs scale
- Color
- Orange to honey-yellow
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 3 on Mohs scale. Color: Orange to honey-yellow. Luster: Vitreous to waxy. Crystal system: Trigonal. Cleavage: Perfect rhombohedral in three directions.
Formation & geological history
Formed through sedimentary processes, typically in marine environments where calcium stays in solution until precipitated by evaporation or biological activity. It can also form in hydrothermal veins.
Uses & applications
Used primarily as decorative stones, in carvings, for metaphysical collection, and historically as a source of lime in cement and agriculture.
Geological facts
Calcite is one of the most common minerals on Earth. Its orange variety is often acid-washed to give it a smooth, waxy feel and appearance, which is likely the case for this specimen.
Field identification & locations
Identify by its relatively low hardness (can be scratched by a copper coin or steel knife) and its effervescent reaction to weak acids like vinegar. Common in locations like Mexico, Brazil, and the USA.
