Know all about Blue Granite and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite and Trachyandesite belong to Igneous Rocks.Texture of Blue Granite is Phaneritic whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Blue Granite appears Shiny and Trachyandesite appears Dull and Soft. The luster of Blue Granite is subvitreous to dull while that of Trachyandesite is earthy. Blue Granite and Trachyandesite are available in black, brown, light to dark grey, white colors. The commercial uses of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling and that of Trachyandesite are creating artwork, pottery.