Know all about Icelandite and Claystone properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite belongs to Igneous Rocks while Claystone belongs to Sedimentary Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Claystone is Clastic. Icelandite appears Dull and Soft and Claystone appears Rough and Dull. The luster of Icelandite is vitreous while that of Claystone is dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Claystone are pottery.