mineral
Blue Calcite
Calcium Carbonate (CaCO3)
Hardness: 3 on Mohs scale; Color: Pale to deep blue; Luster: Vitreous to pearly; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.71
- Hardness
- 3 on Mohs scale
- Color
- Pale to deep blue
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 3 on Mohs scale; Color: Pale to deep blue; Luster: Vitreous to pearly; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.71
Formation & geological history
Formed through sedimentary processes, primarily from the accumulation of calcium-rich marine remains or chemical precipitation in hydrothermal veins. Typical of limestone and marble deposits.
Uses & applications
Used in the manufacture of cement, as an acid neutralizer in the chemical industry, and widely used in jewelry (cabochons) and metaphysical carving.
Geological facts
Blue calcite is known for its 'soapy' or waxy feel when polished. It is often used in aromatherapy and meditation practices because of its calming color.
Field identification & locations
Identified by its softness (can be scratched by a copper coin) and its effervescent reaction to dilute hydrochloric acid. Commonly found in Madagascar and Mexico.
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