Know all about Gabbro and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro and Tachylite belong to Igneous Rocks.Texture of Gabbro is Phaneritic whereas that of Tachylite is Vitreous. Gabbro appears Veined and Shiny and Tachylite appears Glassy. The luster of Gabbro is not available while that of Tachylite is resinous. Gabbro is available in dark grey to black colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Tachylite are cemetery markers, creating artwork.