Know all about Adakite and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Adakite belongs to Igneous Rocks while Coal belongs to Sedimentary Rocks.Texture of Adakite is Porphyritic whereas that of Coal is Amorphous, Glassy. Adakite appears Dull and Soft and Coal appears Veined or Pebbled. The luster of Adakite is grainy, pearly and vitreous while that of Coal is dull to vitreous to submetallic. Adakite is available in black, brown, light to dark grey colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Adakite are commemorative tablets, pottery, used in aquariums and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.