Coquina is one of the important type of rocks. If we have to define Coquina in general, Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of molluscs, trilobites, brachiopods, or other invertebrates. Coquina comes under Sedimentary Rocks. All Sedimentary Rocks have similar properties and formation process. Along with Coquina Definition, know more about the History of Coquina, Etymology of Coquina in next sections.