The French jewelry brand Eternamé has opened its first boutique in Paris, located inside the Peninsula Paris hotel on avenue Kléber in the chic 16th arrondisement, near the Arc de Triomphe. Like the 8-year-old brand’s jewelry—which is made with delicate twists of gold and colorful combinations of aqua amazonites and bright-violet amethysts—the interior of the new shop commands attention. In addition to bespoke services, the 215-square-foot space displays several vibrant pieces from the brand’s founder and desi…