Know all about Basalt and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Basalt belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Basalt is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Pseudotachylite is Quench. Basalt appears Dull and Soft and Pseudotachylite appears Dull and Soft. The luster of Basalt is not available while that of Pseudotachylite is vitreous. Basalt is available in black, brown, light to dark grey colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Basalt are an oil and gas reservoir, commemorative tablets, creating artwork, used in aquariums and that of Pseudotachylite are creating artwork, gemstone.