Round Diamond Rings

Round Diamond Rings: Newer gold-filled jewelry contains a marking, which indicates how much, and what type of gold was used in the layer. For instance, a marking of 1/20 12K G.F., means the jewelry has at least 1/20th of 12 Karat gold by weight. All gold filled jewelry must have a minimum gold content of at least 1/20th of the total weight of the item to be classified