Ross-Simons - .50 ct. t. w. Diamond Y-Necklace in 14kt Two-Tone Gold. 16". An RS exclusive. This classic Y-necklace embraces a modern aesthetic with .50 ct. t. w. baguette and round diamonds that give the look of .94 ct. t. w. marquise and pear-shaped diamond clusters. Set in polished 14kt white and yellow gold. Cable chain includes a 2" extender. Lobster clasp, diamond Y-necklace. Diamond birthstones are the perfect gift for April birthdays.