Know all about Scoria and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Scoria and Tachylite belong to Igneous Rocks.Texture of Scoria is Vesicular whereas that of Tachylite is Vitreous. Scoria appears Glassy and Vesicular and Tachylite appears Glassy. The luster of Scoria is subvitreous to dull while that of Tachylite is resinous. Scoria is available in black, brown, dark grey to black, red colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills and that of Tachylite are cemetery markers, creating artwork.