This seller is using his words very deceptively just be careful. He's offering a large Carcharodontosaurid tooth but his listing title describes it as African T-Rex, Top 1% T-REX Tyrannosaurus and his description has similar comments. If your'e not paying attention you might think its Rex. This one is very convincing.
For new collectors this species has nothing in common with T rex and it's just a marketing ploy. A very nice Carcharodontosaurid tooth but not Rex