Ross-Simons - .10 ct. t. w. Diamond Moon and Star Ring in Sterling Silver. Size 6. RS Pure. Modern designs that complete your outfit and complement your personality. In an on-trend minimalistic design, .10 ct. t. w. diamonds illuminate an open-space crescent moon and star motif. Set in polished sterling silver. 3/8" wide. Diamond moon and star ring. Diamond birthstones are the perfect gift for April birthdays.