Know all about Diabase and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Diabase belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Diabase is Aphanitic, Granular whereas that of Siltstone is Clastic. Diabase appears Vesicular and Siltstone appears Rough. The luster of Diabase is not available while that of Siltstone is dull. Diabase is available in dark grey to black colors whereas Siltstone is available in brown, red, reddish brown 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 Siltstone are raw material for the manufacture of mortar, soil conditioner.