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