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