Know all about Icelandite and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite and Trondhjemite belong to Igneous Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Trondhjemite is Phaneritic. Icelandite appears Dull and Soft and Trondhjemite appears Banded and Foilated. The luster of Icelandite is vitreous while that of Trondhjemite is subvitreous to dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Trondhjemite is available in black, brown, light to dark grey, white colors. The commercial uses of Icelandite and Trondhjemite are cemetery markers, creating artwork.