Know all about Trondhjemite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Trondhjemite and Nephelinite belong to Igneous Rocks.Texture of Trondhjemite is Phaneritic whereas that of Nephelinite is Aphanitic. Trondhjemite appears Banded and Foilated and Nephelinite appears Skeletal. The luster of Trondhjemite is subvitreous to dull while that of Nephelinite is vitreous to metallic. Trondhjemite is available in black, brown, light to dark grey, white colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Trondhjemite are cemetery markers, creating artwork and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).