Australian Opal Doublet Gemstones are the slices of opal glued to a black backing, designed to imitate the appearance of a solid opal. The slices of opal are generally adhered to a black backing because the color tends to become much darker and vibrant with its unique placement. However, the costing of the stones is comparatively much lesser than the original ones because of the small amount of genuine opal. As the Opal doublets consists of layers which are glued together, you must ensure to keep them with utmost care so they can stay with you for a long time. A prolonged exposure to water may cause lifting between the layers and infiltration of water. This does not indicate that it will get ruined by you wearing it in shower once or caught in the rain.