mineral
Orange Calcite
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; 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; Specific gravity: 2.71
Formation & geological history
Formed through sedimentary processes, often precipitated from calcium-rich solutions in hydrothermal veins, caves (as speleothems), or marine environments. Deposits can be hundreds of millions of years old.
Uses & applications
Commonly used for decorative carvings, lapidary work, cabochons for jewelry, and as a popular specimen for gemstone collectors and metaphysical enthusiasts.
Geological facts
Calcite is one of the most common minerals on Earth. It is famous for its double refraction and for reacting strongly (fizzing) with dilute hydrochloric acid. It is the primary constituent of limestone and marble.
Field identification & locations
Identify in the field by its rhombohedral cleavage, softness (can be scratched by a copper penny or knife), and acidic reaction. Commonly found in Mexico, Brazil, and the USA.
