Ah, interesting and definitely not a Sett. I had assumed you meant that the stone had been manufactured into a block, but this is clearly something else. Some

Ah, interesting and definitely not a Sett. I had assumed you meant that the stone had been manufactured into a block, but this is clearly something else. Some kind of special concrete formulation do you think? The formula kept as a trade secret, then lost when the company closed or got bought or something I suppose? Rather unfortunate, alas. Edited