What does 925 213 mean on a diamond bracelet?

Well, darling, 925 typically means the bracelet is made of sterling silver, while 213 could be a manufacturer's code or a design number. So basically, it's just a fancy way of saying your bracelet is made of silver and was probably made by some fancy jewelry company. But hey, as long as it looks good on your wrist, who really cares about those numbers, am I right?