Know all about Troctolite and Phonolite properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite and Phonolite belong to Igneous Rocks.Texture of Troctolite is Phaneritic whereas that of Phonolite is Granular. Troctolite appears Veined and Shiny and Phonolite appears Banded and Foilated. The luster of Troctolite is not available while that of Phonolite is greasy to dull. Troctolite is available in dark grey to black colors whereas Phonolite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Phonolite are cemetery markers, creating artwork.