Know all about Blue Granite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Blue Granite is Phaneritic whereas that of Pseudotachylite is Quench. Blue Granite appears Shiny and Pseudotachylite appears Dull and Soft. The luster of Blue Granite is subvitreous to dull while that of Pseudotachylite is vitreous. Blue Granite is available in black, brown, light to dark grey, white colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling and that of Pseudotachylite are creating artwork, gemstone.