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