The longevity of your gold fill jewelry depends on many factors. Gold fill has the potential to last you a life time if taken care of properly. Factors include the type of products and chemicals that they come in contact with, how long they stay on the jewelry, and your personal body chemisty.
Gold fill jewelry is when 14k gold is bonded to a brass core. It is strictly regulated and has to contain % of gold. Gold plated sometimes known as gold vermiel is when brass or silver jewelry is dipped in a thin layer of gold. It is common for the gold layer to wear off as it comes in contact with your body, chemicals, perfumes, etc.