Know all about Slate and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Diabase belongs to Igneous Rocks.Texture of Slate is Foliated whereas that of Diabase is Aphanitic, Granular. Slate appears Dull and Diabase appears Vesicular. The luster of Slate is dull while that of Diabase is not available. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Diabase is available in dark grey to black colors. The commercial uses of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates and that of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.