Coal vs Granite - Compare Nature
Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas, Granite is available in black, grey, orange, pink, white colors. Appearance of Coal is Veined or Pebbled and that of Granite is Veined or Pebbled. Properties of rock is another aspect for Coal vs Granite. The hardness of Coal is 1-1.5 and that of Granite is 6-7.