mineral
Orange Calcite
Calcium Carbonate (CaCO3) with Iron Oxide inclusions
Hardness: 3 on Mohs scale. Color: Pale orange to deep honey-orange. Luster: Vitreous to waxy. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 2.71.
- Hardness
- 3 on Mohs scale
- Color
- Pale orange to deep honey-orange
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 3 on Mohs scale. Color: Pale orange to deep honey-orange. Luster: Vitreous to waxy. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 2.71.
Formation & geological history
Formed through sedimentary processes, primarily the precipitation of calcium-rich solutions in caves or marine environments. It can also occur in hydrothermal veins. The orange color is typically caused by hematite or goethite inclusions.
Uses & applications
Used primarily as decorative stones, in lapidary work for carvings and spheres, and as a popular metaphysical or collector mineral. Industrially, calcite is used in cement, agriculture, and optics.
Geological facts
Calcite is one of the most common minerals on Earth. Because of its low hardness, it is easily scratched but is beloved for its vibrant colors and 'soapy' feel when polished.
Field identification & locations
Can be identified by its 3-direction rhombohedral cleavage and its reaction (effervescence) when touched by a drop of dilute hydrochloric acid or vinegar. Often found in Mexico, Brazil, and the USA.
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