Know all about Basalt and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Basalt and Tachylite belong to Igneous Rocks.Texture of Basalt is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Tachylite is Vitreous. Basalt appears Dull and Soft and Tachylite appears Glassy. The luster of Basalt is not available while that of Tachylite is resinous. Basalt is available in black, brown, light to dark grey colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Basalt are an oil and gas reservoir, commemorative tablets, creating artwork, used in aquariums and that of Tachylite are cemetery markers, creating artwork.