Rat Creek Construction stocks and sells Limestone! Limestone is a blueish-grey aggregate that is perfect to finish off any landscaping and home-yard improvements, make an excellent driveway finish, or anything in between. Limestone purchase have the option of crushed, or screened. Crushed Limestone in available in sizes 3/8″ to 4″, while Screened Limestone in available in sizes 3/4″ to 6″.