Know all about Argillite and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Diabase belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Diabase is Aphanitic, Granular. Argillite appears Rough and Dull and Diabase appears Vesicular. The luster of Argillite is waxy and dull while that of Diabase is not available. Argillite and Diabase are available in dark grey to black, pink, red, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.