Calleija Jewellers: London, UK: Jewellers and Jewellery Designer. See why London is talking about our Jewellery. From our famous Engagement Rings to our Argyle Pink Diamond Rings, Rare and exclusive. Calleija presents the Glacier - our very own custom cut diamond. Celebrate your treasured moment with a Glacier- rare and exclusive to Calleija. Stay in touch with us to learn more We welcome you at any time to trade up to a new creation featuring a larger Calleija Diamond without any loss on what you have paid for your original Calleija piece. The "No Loss" Diamond upgrade guarantees future purchases of beautiful Calleija Diamond creations.