You don't have to go to the jeweller every time your gold necklaces or earrings start to lose their lustre. There are many reasons why gold trinkets, both new and old, lose their lustre over time. The most common cause of your gold jewellery losing its natural brilliance is known to be regular use. The longer you wear them, the less gloss and glitter they have. That's not all, though. Many variables impair gold's natural brilliance, from grime to cosmetics and common chemicals. Perfumes and moisturisers that you use on your skin might also harm your gold.