Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Oolite Uses. We have provided you with all information about Oolite rock here. Oolite is a sedimentary rock formed from ooids, spherical grains which are composed of concentric layers of calcite. Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Oolite is white. Get to know more about Oolite rock and characteristics of Oolite rock in the next sections.