Know all about Icelandite and Adakite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite and Adakite belong to Igneous Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Adakite is Porphyritic. Icelandite appears Dull and Soft and Adakite appears Dull and Soft. The luster of Icelandite is vitreous while that of Adakite is grainy, pearly and vitreous. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Adakite is available in black, brown, light to dark grey colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Adakite are commemorative tablets, pottery, used in aquariums.