Know all about Coquina and Skarn properties here. All properties of rocks are important as they define the type of rock and its application. Coquina belongs to Sedimentary Rocks while Skarn belongs to Metamorphic Rocks.Texture of Coquina is Clastic whereas that of Skarn is Earthy, Mud-rich, Rough. Coquina appears Layered, Banded, Veined and Shiny and Skarn appears Dull. The luster of Coquina is dull to vitreous to submetallic while that of Skarn is waxy and dull. Coquina is available in beige, buff, orange colors whereas Skarn is available in black, brown, colourless, green, grey, white colors. The commercial uses of Coquina are creating artwork and that of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo).