Ross-Simons - .20 ct. t. w. Diamond Tiara Earrings in Sterling Silver. RS Pure. Modern designs that complete your outfit and complement your personality. These dainty earrings are fit for a queen. The dreamy pair features tiaras with .20 ct. t. w. round brilliant-cut diamonds in polished sterling silver. Post/clutch, diamond tiara earrings. Diamond birthstones are the perfect gift for April birthdays.