Just like the white winged dove, sings a song sounds like she's singing, whoo baby whoo. Inspired by listening to Stevie Nicks in my backyard bird kingdom. The white and yellow gold dove medallion hangs simply on a gold filled ball chain. Choose from 16", 18" or 20" long. 20mm all 18K Brazilian Gold Filled + The material is Brazilian Gold Filled, which is a 3% solid gold layer bonded onto brass. It is more durable than gold plating, but a slightly less layer of gold to US gold filled.