I was given a set if opal earings, necklace and charm for my birthday a few years ago. I returned the above jewellery to a clogau outlet shop when I noticed that over a period of time the stones had changed colour. The shop assistant explained that opals are a porous stone which will react to water which was obviously what had happened. He advised that the jewellery should have been treated to prevent water damage. I agreed for the items to be sent off for a repair assessment. I received an email today asking for £238.50. Which I assumed would be to replace the stones. This is almost as much as it would cost me to purchase the items from new. I am disappointed that clogau didn't provided some sort of warning with the jewellery in the box about possible water damage and to have the jewellery treated to prevent water damage or that clogau does not treat the stones prior to sale. This has put me off purchasing any clogau jewellery in the future.