Know all about Oil shale and Hawaiite 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 Hawaiite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Hawaiite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Oil shale appears Muddy and Hawaiite appears Dull and Soft. The luster of Oil shale is dull while that of Hawaiite is not available. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Hawaiite is available in black, brown, light to dark grey colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Hawaiite are creating artwork, sea defence.