Women White Sapphire Crystal Two Tone Yellow Gold Filled Wedding Adjustable Ring Gem Type:White Cubic Zirconia Metal Type: 18k yellow gold filled Gram Weight:2.0-5.0grams Come with a pretty ring gift box 100% Satisfaction Guarantee What is gold filled? Gold Filled Jewelry is a thick (about 25mil) solid layer of quality gold heat bonded onto an internal semi-precious metals by advanced mechanical process. It has all the great characteristics of solid gold jewelry without price tag . Please do not compare gold filled jewelry to plated jewelry (usually only 3 mil layer) as there is no comparison, gold filled is much more valuable and tarnish resistant than plated. It does not tarnish or discolor. It is extremely long lasting and if taken care of will last you a lifetime. In general,gold filled jewelry is an economical alternative to solid gold jewelry.