Doublet Opal Loose (Un-Set) with 3.59 ct, and it is covered by our international warranty. All our jewellery and loose opal items come with a warranty. During checkout, you can request modifications or specific colour requirements for the opal at an additional cost. We can also change or upgrade the opal or design of any item upon request. Please note that Opals have a living play of colour, which is difficult to capture on camera, so the item received may differ from the one shown online.