Know all about Tachylite and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Diabase belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Diabase is Aphanitic, Granular. Tachylite appears Glassy and Diabase appears Vesicular. The luster of Tachylite is resinous while that of Diabase is not available. Tachylite is available in black, dark brown colors whereas Diabase is available in dark grey to black colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.