My husband found this while on a deployment to Sinai Egypt. It looks like some kind of tooth to me.
Thank you for the submission! Could you send more pictures from different angles? It's hard to identify with just one. However, I can go ahead and say I don't think it's a tooth. The fissures and irregular surface hint towards it not being bone at all, rather some kind of shell or fossilized coral. That's all I can say based off this one picture.


















