Know all about Rapakivi Granite and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Rapakivi Granite belongs to Igneous Rocks while Coal belongs to Sedimentary Rocks.Texture of Rapakivi Granite is Granular, Phaneritic whereas that of Coal is Amorphous, Glassy. Rapakivi Granite appears Veined or Pebbled and Coal appears Veined or Pebbled. The luster of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous while that of Coal is dull to vitreous to submetallic. Rapakivi Granite is available in black, grey, orange, pink, white colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.