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