There are three main factors that determine the value of a piece of gold jewelry. They are:
Weight: Since gold is sold by weight, it stands to reason that the heavier the jewelry, the more gold content there is contained in it and the more expensive it will be. As gold jewelry gets lighter, it becomes more inexpensive.
Design: Common, manufactured designers will be more cost-effective than one-of-a-kind pieces, which are rare and unique and thereby pricier.
Finish: The finish of a gold piece makes a difference. If a special finish, such as a matte or a sand-blasted finish has been used, the value of the gold jewelry increases.