Know all about Gabbro and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro and Trondhjemite belong to Igneous Rocks.Texture of Gabbro is Phaneritic whereas that of Trondhjemite is Phaneritic. Gabbro appears Veined and Shiny and Trondhjemite appears Banded and Foilated. The luster of Gabbro is not available while that of Trondhjemite is subvitreous to dull. Gabbro is available in dark grey to black colors whereas Trondhjemite is available in black, brown, light to dark grey, white colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Trondhjemite are cemetery markers, creating artwork.