Know all about Troctolite and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite and Rhyolite belong to Igneous Rocks.Texture of Troctolite is Phaneritic whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Troctolite appears Veined and Shiny and Rhyolite appears Banded. The luster of Troctolite is not available while that of Rhyolite is earthy. Troctolite is available in dark grey to black colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Rhyolite are gemstone, laboratory bench tops, jewelry.