Our ceramic wooden rings are almost just as durable as our tungsten wooden rings. If you are not familiar with tungsten it's probably one of the most durable materials out there. The ceramic rings are actually harder to scratch than tungsten rings. One of the reasons we cannot engrave customers initial on ceramic rings is due to the material being harder than tungsten. We use a diamond bit that engraves our rings and the diamond bit cannot pierce the surface of the ceramic rings.
The main difference between a tungsten ring and ceramic ring is if they are ever dropped or hit against something pretty hard. A tungsten ring usually always survives a drop but a ceramic ring has a chance of breaking if dropped from a decent height or knocked against something really hard.