Ross-Simons - .50ct t. w. Black, White Diamond Eternity Band Ring in Gold. Size 9. Our eternity band boasts the sleek sparkle of alternating .37 ct. t. w. black diamonds and .13 ct. t. w. white diamonds in a chic contrast. Set in polished 14kt white gold, it's the perfect ring for stacking! Black diamonds are set in black rhodium for a seamless look. 1/16" wide. White and black diamond eternity band. Diamond birthstones are the perfect gift for April birthdays.