I have a Blanco silgranit sink that was installed in Oct. I know have two chips and I have no idea how it happened. It didn’t happen from the installation and must have happened in the last month. I can replace the sink, but the labor is going to cost me and the inconvenience and the contractor is telling me it will happen again. Does anyone know how common this problem is or how it could have even happened? I’m assuming it can’t be repaired.