Pin On Pretty Young Girls Catena Illusion Diamond Charm Necklace. Catena Diamond Illusion Charm Necklace in 18k yellow gold (13. 70g) with a diamond illusion setting on each charm. The charms are made up of a round shape, a pear shape, a heart shape, a hexagon shape and a marquise shape. The diamonds are set in a cluster of brilliant (0. 08ct), marquise (0. 33ct), pear (0. 25ct), baguette (0. 19ct) and princess (0. 24ct) cut diamonds. Please note: jewellery is made to order and therefore only available for exchange should you change your mind.