Shaun buys a brilliant emerald necklace worth $7000 for Edwina for her birthday from Wizardstone Jewellery. Shaun knows Edwina's dream is to own emeralds mined from the Muzo emerald mine in Colombia and Wizardstone Jewellery assures Shaun that the emeralds in the necklace are from Muzo. Later, when Edwina happens to show her new emerald necklace to a friend who happens to be a jewellery valuer, he tells her that the emeralds are not from Muzo, and that they are in fact fake emeralds bought from Paddy's Market. What rights does Shaun have against Gemstone Jewellery?