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 Aplite Uses. We have provided you with all information about Aplite rock here. Aplite is a fine-grained granite composed mainly of feldspar and quartz. Aplite is available in black, grey, orange, pink, white colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Aplite is white. Get to know more about Aplite rock and characteristics of Aplite rock in the next sections.