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