Know all about Troctolite and Coquina properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite belongs to Igneous Rocks while Coquina belongs to Sedimentary Rocks.Texture of Troctolite is Phaneritic whereas that of Coquina is Clastic. Troctolite appears Veined and Shiny and Coquina appears Layered, Banded, Veined and Shiny. The luster of Troctolite is not available while that of Coquina is dull to vitreous to submetallic. Troctolite is available in dark grey to black colors whereas Coquina is available in beige, buff, orange colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Coquina are creating artwork.