Countertop questions

 Archives Houzer-Zero-Radius-Undermount-Trough-Bar-Prep-Sink-4285For our kitchen we are doing a zero radius undermount sink like the one in the picture. We are looking for a white countertop material, but are having troubles finding one that can be square cut like the picture above. We had planned on doing a Silestone in zeus white, but were told by our installer that the smallest inside corner radius they can do is 1/2 inch or else it will crack. According to them the same goes for any stone and even Corian. We are finding the same problem with our flush mount induction cooktop. So the question....

Does anyone know a good white countertop that can be zero radius like the picture above?

Please excuse me while I pay some bills...