This is a French translation of the February 17, 2014, version of UVA-M-0853. As marketers love to teach students, differentiation must be the focal point of marketing strategy. But what happens when a firm's competitive set is shared by similar customers, perceived differentiation is weak among rivals, and loyalty is a thing of the past? This was the dilemma the French luxury jeweler Mauboussin faced: how to leverage its iconic brand to access new customers, domestically and abroad, and through new channels, while preserving the image of luxury goods founded on the myth of rarity and exclusivity? The case was designed and used for the latter portion of an international MBA marketing course and would work well in most international business courses.