Aragonite is a crystallized form of what compound?

Aragonite is indeed a crystallized form of calcium carbonate, which is represented by the chemical formula CaCO₃. This mineral is one of the two primary crystal forms of calcium carbonate, the other being calcite. Aragonite typically forms in marine environments and is significant in carbonate sediments and biological processes, such as the formation of coral and mollusk shells.

The unique crystalline structure of aragonite differs from that of calcite, giving it distinct physical properties, including a different hardness and crystal habit. Understanding that aragonite is a polymorph of calcium carbonate is essential in the study of geology, mineralogy, and various applications in industries that utilize carbonate minerals.