Gold Filled jewellery is your closest alternative to Solid Gold but without the high price tag. It's less expensive than solid gold, yet it's still durable, looking shiny and new even with decades of wear with proper care.
Gold Filled material is composed of a solid layer of gold (typically constituting at least 5% of the item's total weight) mechanically bonded to a base of either sterling silver or brass. This quality is defined by the Federal Trade Commission (FTC) in the USA.
Even with daily wear, Gold Filled jewellery can last 10 to 30 years (depending on how much water, salt, sweat & chemicals it is exposed to).
The layer of gold on Gold Filled items is 5 to 10 times thicker than that produced by regular gold plating which typically contains only 0.05% solid gold.
Keep Gold Filled jewellery away from acid, perfume, cleaning chemicals, salt and chlorine. After swimming in the ocean, rinse immediately with freshwater to prevent salt build up in clasps, nooks and crannies and prevent to gold turning dull.
N.B. Earring pins made of Gold Filled can tarnish due to acids in the skin.