Connoisseurs Delicate Jewellery Cleaner Delicate Bath For Semi-Precious Stones, Pearls & Costume Jewellery Connoisseurs Delicate Jewellery Cleaner is formulated to gently clean jewellery and revive the brilliance to your delicate jewellery. Delicate Bath is good for cleaning semi-precious stones, such as, pearls, opal, coral, onyx, turquoise and costume jewellery. 8 FL. OZ. (236ml) Dip tray and brush included