Extremely rare Masiakasaurus ungual or foot claw. The Masiakasaurus or "Vicious lizard" was a small (2m) theropod with a very unique dentition. It suggests that they had a specialized diet, perhaps including fish and other small prey. The claw is in excellent condition with just a small crack restoration.
The dinosaur locations in Madagascar rarely deliver claws and if they do, they are as good as always Sauropod claws or unguals. To get hold of a Theropod claw is really exceptional.