Oscar Heyman 1980s 1.40ctw Blue Sapphire & Diamond Solid 18K Yellow Gold Ring - This captivating ring was made by Oscar Heyman, and was finely crafted of solid 18k yellow gold. Since the inception of the brand in 1912, the jewelry house has manufactured pieces for names such as Tiffany & Co., Van Cleef & Arpels and Cartier, eventually becoming known in the jewelry industry as "The jewelers' jeweler". While working for Cartier in 1969, the Heyman brothers designed and crafted the pear shape diamond necklace for the 68 carat Taylor-Burton Diamond. This ring has a splendid design with three pointed crests which are lined in an alternating pattern with diamonds on one side and blue sapphires on the other. The ring boasts approximately 0.75ctw vivid blue sapphires and 0.65ctw fiery white VS1-VS2/E-F diamonds. The inside of the band is stamped with the Oscar Heyman Bros. hallmark along with the serial number and gold purity "18K", and is also engraved "75th Year". Ring size: 6. Ring Top Dimensions: 15 x 10mm. (WEIGHT: 7.5 grams) PLEASE NOTE, PRE-AUCTION SALES: GWS reserves the right to sell any Lot(s) through a negotiated transaction at any time prior to the conclusion of the auction. If a Lot is sold through a negotiated transaction, it will be withdrawn from the auction. All pre-auction purchases will receive free, overnight, insured shipping. Please email gwsauctions@gmail.com to submit a pre-auction offer.