This pendant is an Intarsia. Intarsias are artfully created by skilled lapidaries by merging three different stones together. No seams can be felt. This Intarsia is made of Rock Quartz that has several carved holes on the back side of the stone, a slice of Lab-Grown Opal, and a large piece of Black Onyx that has a Resist Finish and several carved holes on the front side, ending with a stunning composition. This pendant is set in non-tarnishing Argentium™ Sterling Silver. Chains are sold separately.