Know all about Icelandite and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite and Troctolite belong to Igneous Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Troctolite is Phaneritic. Icelandite appears Dull and Soft and Troctolite appears Veined and Shiny. The luster of Icelandite is vitreous while that of Troctolite is not available. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Troctolite is available in dark grey to black colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.