Know all about Diabase and Shale properties here. All properties of rocks are important as they define the type of rock and its application. Diabase belongs to Igneous Rocks while Shale belongs to Sedimentary Rocks.Texture of Diabase is Aphanitic, Granular whereas that of Shale is Clastic, Splintery. Diabase appears Vesicular and Shale appears Muddy. The luster of Diabase is not available while that of Shale is dull. Diabase is available in dark grey to black colors whereas Shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Shale are creating artwork, pottery.