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