Product Details + Unique vintage 18K yellow gold and 0.73CT sapphire ring. Ring has a beautiful texture that enhances it's design.ID#: RG114Sapphire: One (1) prong set, round faceted sapphire with an estimated weight of 0.73CT. Sapphire is very fine quality.Metal: 18K yellow goldSize: 9 1/2Weight: 18.5gMarkings: '18K'