Instructions:When you use our Build Your Own Diamond Jewellery® feature, offer applies only to the setting for a ring, earring, or pendant. Offer is not valid for any loose diamonds, pre-set engagement rings, or watches. Offer is not valid for any gift certificate or polishing cloth purchase. Reference code UKGIFT20 MUST be entered in cart or mentioned over phone at time of purchase. Offer may not be combined with any other offer and cannot be applied retroactively. Void where prohibited. Offer valid through Tuesday, June 29, 2010.