Stonebricks and cobblestone weather

Similarly to how copper blocks oxidize over time, I think it would be really neat to have stonebricks and cobblestone work the same way with their mossy and cracked counterparts. This process would take much longer than oxidization like it would in real life. This would add a unique element to so many builds that often use those stone blocks and will show how old they are. Either wax or a new item could be used to prevent weathering.