mineral

Caribbean Calcite

Calcium Carbonate with Aragonite (CaCO3)

Hardness: 3 on Mohs scale; Color: Ocean blue, light green, and white/sand; Luster: Vitreous to waxy; Crystal structure: Trigonal/Orthorhombic; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Hardness: 3 on Mohs scale
Color: Ocean blue, light green, and white/sand
Luster: Vitreous to waxy

Identified April 4, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Ocean blue, light green, and white/sand; Luster: Vitreous to waxy; Crystal structure: Trigonal/Orthorhombic; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Formation & geological history

Formed through sedimentary processes in marine environments or caves where calcium carbonate precipitates. This specific variety was discovered in 2019 in Pakistan and is estimated to be from the Holocene epoch.

Uses & applications

Primarily used for decorative purposes, lapidary carvings (points/towers), jewelry-making, and by mineral collectors.

Geological facts

Caribbean Calcite is a combination of blue calcite and light brown/white aragonite. It is named for its visual resemblance to a tropical beach with blue water and sandy shores.

Field identification & locations

Identify by its unique banding of sea-foam blue and tan aragonite. It is soft and will react (fizz) to dilute hydrochloric acid. It is currently only found in a small region of Pakistan.

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