mineral
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
Mohs hardness of 3; light to sky blue color with white banding; vitreous to pearly luster; trigonal crystal system; perfect rhombohedral cleavage in three directions; specific gravity of 2.71.
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Physical properties
Mohs hardness of 3; light to sky blue color with white banding; vitreous to pearly luster; trigonal crystal system; perfect rhombohedral cleavage in three directions; specific gravity of 2.71.
Formation & geological history
Formed in sedimentary environments through the precipitation of calcium carbonate from water solutions, often in hydrothermal veins or cavities of limestone and other sedimentary rocks.
Uses & applications
Commonly used in crystal healing, decorative carvings, lapidary arts, and mineral collecting.
Geological facts
Blue calcite is known for its calming energy and is softer than many other popular decorative crystals, meaning it can be easily scratched by a knife or glass.
Field identification & locations
Easily identified by its soft nature (Mohs 3), perfect rhombohedral cleavage, and effervescence (bubbling) when exposed to weak hydrochloric acid. Found globally with notable deposits in Madagascar.
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