Three Stone Antique Engagement Ring Cushion Cut Diamonds. This antique engagement ring was made in the Victorian era and features a G.I.A. certified .77 carat Old Mine Cushion cut (GIA# 5171231856). The accent diamonds on either side of the center stone are rose cut diamonds that weigh .08 carat each. All three diamonds are set flush into the 14k yellow gold ring making it easy and comfortable to wear. This wedding ring has a dome shape and the band tapers as it wraps around the finger.