1/5 ct Black & White Diamond Square Stud Earrings By Andy - August 6, 2015 1230 Use $20 Off Coupon Code: SALE An exotic twist on classic diamond stud earrings. Tiered arrangements of glistening round-cut black and white diamonds totaling 1/5 ct are set in sleek sterling silver. Pieces measure 5/16 by 5/16 inches.