Know all about Icelandite and Novaculite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite belongs to Igneous Rocks while Novaculite belongs to Sedimentary Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Novaculite is Banded, Glassy, Rough, Vitreous. Icelandite appears Dull and Soft and Novaculite appears Glassy or Pearly. The luster of Icelandite is vitreous while that of Novaculite is waxy and dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Novaculite is available in black, brown, green, grey, red, white colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Novaculite are cemetery markers, gemstone, in aquifers, in fire-starting tools, jewelry, manufacture of tools, pebbles are used in ball mills to grind in ceramics industry, to determine the gold content of jewelry.