Vintage French 0.45ct Sapphire Ring with Floral Engraving in 18k Yellow Gold

Vintage French 18k yellow gold and sapphire ring with an engraved floral motif along the shank.  ID#: RG930 Sapphire: One (1) prong set, faceted royal blue sapphire measuring approximately 4.37mm x 3.89mm x 2.79mm. The estimated sapphire weight is 0.45ct. Metal: 18k yellow gold  Size: 5 1/2 Weight: 1.03g  Markings: Eagle's head French hallmark