1.30ct Certified Diamond Engagement Ring, .77ct t.w. Side Diamonds. Size 7 Let there be no doubt that when you pull this stunning certified diamond ring out of your pocket, you will hear an enthusiastic "yes!" She'll love the center 1.30 carat certified diamond, let alone the .77 ct. t.w. princess-cut diamond accents. A perfect question-popper. GIA CERT#16141585. Polished platinum ring. Diamond birthstones are the perfect gift for April birthdays.