Limestone

Limestone is a type of sedimentary rock that is used to make construction materials, such as cement.

The limestone used to bind some stone blocks together that made up a great dam was flawed due to the projects of Hank and Ben, who had developed a blue ray extractor, that was capable of extracting the blue particles from gold, rendering the ore null of such metal. However, the blue beam had an affect on far more than just the gold, even the limestone.