Know all about Icelandite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite belongs to Igneous Rocks while Slate belongs to Metamorphic Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Slate is Foliated. Icelandite appears Dull and Soft and Slate appears Dull. The luster of Icelandite is vitreous while that of Slate is dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates.