This is a type of Asian Dragon called a Cosmic Dragon and this one is Gou Mang a queen ( female dragon). The Gou Mang will bring wealth and every type of prosperity you can think of. It is a beautiful necklace and would probably go on for more, save for the fact that it is not sterling.
This dragon will also give you good health and long life that you can enjoy. In her hand she holds real Jade a symbol of the wealth she will give to you.