Estimated 14K Gold Gram Weight for Size 7: 3.80 Gms.Diamond Eternity Band - 3/5 Ct Diamond & 9/10 Ct Sapphire Eternity Band Milligram (2389 ) his is a beautiful channel set eternity band with alternating diamond and sapphire rounds. The band has migraine on both sides. The ring is approx 3.4 mm wide.