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