Know all about Icelandite and Oil 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 Oil shale belongs to Sedimentary Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Oil shale is Splintery. Icelandite appears Dull and Soft and Oil shale appears Muddy. The luster of Icelandite is vitreous while that of Oil shale is dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Oil 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 Oil shale are an oil and gas reservoir.