Stainless Steel US Air Force USAF Military Ring with Blue Stone, Size 12 Whether active or a veteran, this ring is a must for any US Air Force officer. Its crafted in stainless steel so it is made to last. A perfect gift that will make his pride soar.,Material: Stainless Steel,Plating: High Polished (no plating),Center Stone Type: Synthetic Glass,Center Stone Color: Montana Blue,Center Stone Size (approx.): 12, 10 mm,Center Stone Weight: (approx.): 7.70 ct,Ring Weight (approx.): 17.40 g,Size 10