sedimentary

Caribbean Calcite

Calcium Carbonate (CaCO3) with Aragonite (CaCO3)

AI-generated identification · may be incorrect

Hardness: 3 on Mohs scale; Color: Light blue, seafoam green, and white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Orthorhombic mix; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Light blue, seafoam green, and white
Luster: Vitreous to waxy

Identified May 7, 2026More sedimentary →

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Physical properties

Hardness: 3 on Mohs scale; Color: Light blue, seafoam green, and white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Orthorhombic mix; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary processes involving the precipitation of calcium carbonate in marine or hydrothermal environments. This specific combination was recently discovered in Pakistan around 2019.

Uses & applications

Primarily used for lapidary work, decorative carvings (like the heart shape shown), jewelry, and by mineral collectors for its unique aesthetic appeal.

Geological facts

Despite its name, it is not found in the Caribbean; it is named for its color which resembles the Caribbean Sea. It is a unique combination of blue calcite and brownish-white aragonite.

Field identification & locations

Identify by its distinctive pastel blue color contrasted with white/sand-colored banding or pockets. It is relatively soft and can be scratched by a copper coin. Mostly found in Pakistan.