Vintage Saphiret Costume Jewelry Necklace Rare

vintage blue and purple saphiret necklace condition is pre-owned color blue and purple metallic silver tone backing I believe this is from the 1940s or 1950s measurements is approximately 16 in in length the stone is saphiret (gold fused with glass) from what I researched I believe this necklace to be rare if you have any questions or would like any additional pictures please ask before purchasing thank you