I work in construction and after a close call, decided to swap to silicon rings to completely remove the risk of ring avulsion. This set of rings look very nice, my favorite being the marble one (wish they had jade look-alike though!). The rings are very comfortable and are made of good quality. No seems in the silicon can be seen.
I would recommend getting a smaller size if your finger diameter falls between two ring sizes. These rings have a little stretch to them, so smaller is better as it will be more snug. They are extremely comfortable.