This quietly glittering Matrix Tennis necklace will never go out of style, day or night. Elegant and refined, it features square cut clear stones encased in sleek rhodium plated settings. Wear it to elevate a simple white T-shirt and jeans, or with evening pieces for an effortless touch of glamour. This Matrix Tennis necklace is part of the Matrix family, designed by Creative Director Giovanna Engelbert for Collection I. How to close and open it: slide the hooks into the corresponding holes at the base of the end stone and push to click into place. Fasten the security chain using the small lever clasp. To open, unfasten the security chain and press the buttons on either side of the stone at the same time to release the hooks.