Lovely vintage choker necklace with green glass semi flat cabochons connected by a Sterling Silver chain & Marcasite links. The chain & spring ring clasp have heavier Sterling Silver patina easily polished out if desired. The backs holding the stones have minor Silver patina compared to the Chain, Marcasite & Spring Ring area. The necklace is 16 inches and for reference the largest highly polished portion measures 1 5/16 x 15/16 inch. The condition is very good to excellent and the age would be the 1920's. The Spring Ring used in this necklace is the popular Sports Ring used in the earlier 1900's.