Portland Stone Firms are about to go underground

David McHutchon | September 19, 2017
img0 Used in the construction of some of the world’s most elegant landmarks, Portland stone is renowned. But after centuries of being quarried, surface reserves are dwindling, leading the only two licensed extraction firms to turn to mining instead. Mining-technology.com reports on how the transition underground is being made. What do such seemingly disparate edifices, both ...