14KW 0.43CT MARQUISE BLUE SAPPHIRE W/ 0.37CTW DIAMOND HALO RING. LADY'S WHITE 14 KARAT CONTEMPORARY FASHION RING, ONE 0.43CT MARQUISE BLUE SAPPHIRE, 10=0.37TW ROUND G/H/I I1-I2 DIAMONDS. GRAMS: 5.9. *WEIGHTS ESTIMATED. ***GEMSTONES ARE subjected to enhancement processes or treatments. If you have questions regarding the care of your gemstone jewelry simply ask our knowledgeable staff.