Know all about Trondhjemite and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Trondhjemite and Variolite belong to Igneous Rocks.Texture of Trondhjemite is Phaneritic whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Trondhjemite appears Banded and Foilated and Variolite appears Dull and Soft. The luster of Trondhjemite is subvitreous to dull while that of Variolite is not available. Trondhjemite and Variolite are available in black, brown, light to dark grey, white colors. The commercial uses of Trondhjemite and Variolite are cemetery markers, creating artwork.