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