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