Large Etched Oval RingOne of a kind large handmade sterling silver ring. Sterling silver Size: 6. 5 Face Dimensions: 1. 6 x 0. 9 The pattern on the face has been achieved using a technique called electro etching. This technique uses a chemical bath coupled with electricity to cut the design into the metal. It is then treated with a solution that creates a darkened patina to bring out the details in the pattern.