This cable band ring is authentic from David Yurman, crafted from sterling silver with 18k yellow gold accent featurig an 8mm wide band in silver with the cable design. The front of the ring has a 12mm long strip with yellow gold on each end and the strip is full decorated with round cut yellow sapphire gemstone. The band is signed by the designer with the gold and silver content.Hallmark: D.Y 925 750 Yellow Sapphire: 1.50 total carat weight Measurement: front: 0.70" across x 0.38" wide x 0.17" highRing Size: 7Weight: 9.5 grams