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