Know all about Gneiss and Ijolite properties here. All properties of rocks are important as they define the type of rock and its application. Gneiss belongs to Metamorphic Rocks while Ijolite belongs to Igneous Rocks.Texture of Gneiss is Banded, Foliated, Platy whereas that of Ijolite is Earthy, Granular. Gneiss appears Foliated and Ijolite appears Banded and Foilated. The luster of Gneiss is dull while that of Ijolite is greasy to dull. Gneiss is available in black, brown, pink, red, white colors whereas Ijolite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums and that of Ijolite are cemetery markers, creating artwork.