Know all about Foidolite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite and Rhyodacite belong to Igneous Rocks.Texture of Foidolite is Earthy whereas that of Rhyodacite is Earthy. Foidolite appears Dull and Rhyodacite appears Skeletal. The luster of Foidolite is subvitreous to dull while that of Rhyodacite is greasy to dull. Foidolite is available in black, brown, colourless, green, grey, pink, white colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Foidolite and Rhyodacite are cemetery markers, commemorative tablets, creating artwork.