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