Know all about Oil shale and Rapakivi Granite properties here. All properties of rocks are important as they define the type of rock and its application. Oil shale belongs to Sedimentary Rocks while Rapakivi Granite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Rapakivi Granite is Granular, Phaneritic. Oil shale appears Muddy and Rapakivi Granite appears Veined or Pebbled. The luster of Oil shale is dull while that of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Rapakivi Granite is available in black, grey, orange, pink, white colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones.