Know all about Oolite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Oolite belongs to Sedimentary Rocks while Tachylite belongs to Igneous Rocks.Texture of Oolite is Clastic or Non-Clastic whereas that of Tachylite is Vitreous. Oolite appears Rounded and Rough and Tachylite appears Glassy. The luster of Oolite is pearly to shiny while that of Tachylite is resinous. Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Oolite are creating artwork, jewelry, used in aquariums and that of Tachylite are cemetery markers, creating artwork.