Know all about Coquina and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Coquina belongs to Sedimentary Rocks while Icelandite belongs to Igneous Rocks.Texture of Coquina is Clastic whereas that of Icelandite is Aphanitic to Porphyritic. Coquina appears Layered, Banded, Veined and Shiny and Icelandite appears Dull and Soft. The luster of Coquina is dull to vitreous to submetallic while that of Icelandite is vitreous. Coquina is available in beige, buff, orange colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Coquina are creating artwork and that of Icelandite are cemetery markers, creating artwork.