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