A beautiful one of a kind genuine black and white stone - Dendritic Opal. This power stone is hand wrapped and set with our signature trillion cubic zirconia stone. Worn on 14K gold filled chain, this style is sure to be on to cherish! What is Gold filled? When purchasing jewelry a more economical than solid gold but still beautiful option is a gold filled piece. Jewelers create gold filled jewelry by pressure bonding an actual layer of "solid" gold to another metal. ... Wearers who are sensitive to certain metals can wear gold filled without worries of an allergic reaction.