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