Blue topaz; 18K gold; sterling silver; Hinged; Almost all gemstones and blue and black diamonds have been treated to enhance their beauty and require special care; Photo may have been enlarged and/or enhanced; All gemstone carat weights (tcw) are approximate; variance may be 0.05 carat.; Some silver jewelry may be surface-coated with rhodium to enhance metal color and shine; it may wear off over time requiring replating.; Imported