Belle Epoque Diamond and Ruby NecklaceBelle Epoque Diamond and Ruby Necklace European, 1900 A navette shaped setting with tiny calibre cut rubies surrounding a marquise cut diamond. The stones are set in 18k gold and platinum. The piece was once part of a turn of the century ring and later set into a necklace. The primary stone is estimated to weigh . 75 carats; however, it looks larger due to the wide face proportions of the stone. Hanging on a modern 18" 18k yellow gold chain.