Know all about Rhyodacite and Appinite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite and Appinite belong to Igneous Rocks.Texture of Rhyodacite is Earthy whereas that of Appinite is Porphyritic. Rhyodacite appears Skeletal and Appinite appears Dull, Banded and Foilated. The luster of Rhyodacite is greasy to dull while that of Appinite is subvitreous to dull. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Appinite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Rhyodacite are cemetery markers, creating artwork and that of Appinite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner.