Semi Precious Stud Earrings You will receive Genuine Sapphire Earrings-- with 14kt Gold Filled Posts Fun Fact: Gold-filled jewelry supplies are legally required to be 5% or 1/20 gold by weight. Gold Filled jewelry is made by wrapping layers of solid gold (14K, 12K, or 18K) sheets around a base metal (usually brass). Unlike gold plated jewelry, gold filled jewelry actually has a measurable amount of gold in it. This process of adhering solid gold sheets makes for jewelry that does not tarnish, peel, chip or discolor. If your gold filled jewelry has ever changed color at all its usually just because of dirt build up and can be cleaned with a damp cloth. Also unlike Silver it won't tarnish Gold Plated: The process of gold plating is one where a minuscule layer of gold is applied over a base metal (usually brass). The amount of real gold that is used is actually so tiny that its technically considered unmeasurable (less than .05%). This is why gold plating will wear off (actually pretty quickly)