Rock Identifier
Aragonite (Calcium Carbonate (CaCO3)) — mineral
mineral

Aragonite

Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Hardness of 3.5-4 on Mohs scale, typically white, gray, or yellowish with a vitreous to resinous luster. It crystallizes in the orthorhombic system and often forms fibrous or stalactitic aggregates.

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Physical properties

Hardness of 3.5-4 on Mohs scale, typically white, gray, or yellowish with a vitreous to resinous luster. It crystallizes in the orthorhombic system and often forms fibrous or stalactitic aggregates.

Formation & geological history

Formed in low-temperature environments such as caves, hot springs, and marine deposits through the precipitation of calcium carbonate.

Uses & applications

Utilized in mineral collections, decorative ornamental carvings, and holistic wellness practices.

Geological facts

Aragonite is chemically identical to calcite, but its orthorhombic crystal structure makes it thermodynamically unstable at standard surface pressure and temperature.

Field identification & locations

Identified by its characteristic fibrous fracture and effervescence when tested with dilute hydrochloric acid. Commonly sourced from Morocco, Spain, and the USA.