mineral

Blue Aragonite

Aragonite (Calcium Carbonate, CaCO3)

Hardness: 3.5-4.0 on Mohs scale. Color: Pale blue, turquoise-blue, often with white or brown host rock (matrix) inclusions. Luster: Vitreous to pearly. Crystal structure: Orthorhombic. Cleavage: Distinct. Specific Gravity: 2.9-3.0.

Hardness: 3
Luster: Vitreous to pearly

Identified July 1, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the oxidized zones of ore deposits or as precipitates from hot springs and caves (speleothems). It is a high-pressure polymorph of calcium carbonate, typically forming in low-temperature aqueous environments near the Earth's surface.

Uses & applications

Primarily used as a decorative stone, in lapidary work for carvings, obelisks, and cabochons, and as a collector's mineral specimen. It is also used in metaphysical practices for its purported calming properties.

Geological facts

Aragonite is chemically identical to calcite, but they have different crystal structures. It is often found in the shells of marine organisms and pearls. The specific blue variety is prized for its soothing color which resembles calm sea water.

Field identification & locations

Identify in the field by its characteristic light blue hue, reactionary bubbling when exposed to weak hydrochloric acid (due to carbonate content), and lower hardness compared to quartz. Common locations include Argentina, China, and Pakistan.