What is this called? (Pendant)?

Yes,it is a type of pendant.A pendant (from Old French) is a loose-hanging piece of jewellery, generally attached by a small loop to a necklace, when the ensemble may be known as a "pendant necklace". A pendant earring is an earring with a piece hanging down. In modern French "pendant" is the gerund form of “hanging” (also meaning “during”). Pendants can have several functions, which may be combined: