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