This necklace is designed with a water jug motif. Inside the water jug, an opalescent opal with blue play-of-color is set to appear as if floating. I polished this stone myself. To create depth within the water jug, some matrix remains on the back. I polished the surface gently, creating waves to give it a moist appearance. Materials: silver925 with rhodium coating (maintains shine without polishing), natural Australian opal