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