US Air Force Ring - (Stainless Steel w/ Blue Stone) - USAF Military Rings Jewelry - Officers Military USAF RING - High Polished Stainless Steel Military Ring: Air Force Search "C&D Military Jewelry" on Amazon For More Military Items to Choose From! Center Stone Type: Synthetic, Material: Stainless Steel. Center Stone Color: Blue Sapphire, Product Weight (Approx) 19.60(g) (1) Military Air Force Ring for Active officers or Veterans!