Vintage Filigree Negligee Necklace with Green Crystal and Faux Pearls

This is a vintage-style negligee necklace, likely dating from the early to mid-20th century, specifically evoking the Art Deco or Edwardian revival aesthetics. The centerpiece features a large, faceted oval light green stone, possibly glass or a synthetic spinel, bezel-set within a scalloped silver-tone metal frame. Directly above the pendant is a decorative, triangular filigree metal piece which connects to the chain. The necklace is constructed with a delicate link chain that incorporates several small cream-colored faux pearls (simulated pearls) spaced along the lower portion. The metal appears to be a silver-toned base metal or sterling silver, showing significant aged patina and localized tarnish, particularly in the recessed areas of the filigree and the pendant frame. The clasp is a traditional box-style slide or fishhook clasp, which displays decorative engraving. There are visible signs of wear consistent with age, including minor surface scratches on the green stone and some dulling of the pearl luster. The craftsmanship is indicative of mid-range costume jewelry from the 1920s-1940s eras, focusing on delicate lace-like metalwork and colorful glass accents.