Although limestone deposits are found in every state, only a small portion is pure enough for industrial lime manufacturing. To be classified as limestone, the rock must contain at least 50 percent calcium carbonate. When the rock contains 30 to 45 percent magnesium carbonate, it is referred to as dolomite, or dolomitic limestone. Lime can also be May 02, 2018 It is about 10% of the total amount of sedimentary rock found on our planet. Quarrying limestone is the process of removing this material from the ground. As with any quarrying process, there are certain pros and cons that must be evaluated. List of the Pros of Quarrying Limestone. 1. It can be an economic engine. According to Bowles (1), limestone is composed mainly of calcium carbonate (CaC0 3). The rock is known as a high-calcium limestone if the magnesium carbonate content is small. The rock is called a magnesium or dolomitic limestone if 10 percent