Vintage Marcasite and Emerald Green Glass Cross Pendant Necklace

This is a substantial vintage pendant necklace featuring a large, ornate cross suspended from a gold-toned chain. The cross is constructed with a yellow gold-plated or base metal frame that houses a detailed openwork floral or foliate design in darkened silver-tone metal. This structural insert is pavé-set with numerous marcasite stones, which provide a subtle, metallic luster. At the central intersection of the cross sits a round-cut green stone, likely emerald-colored glass or a synthetic spinel, held in a multi-prong setting. The bale is similarly decorated with marcasite in a scrolled fleur-de-lis pattern. The cross is paired with a yellow-gold colored box or Venetian-style chain with a lobster claw clasp. The overall style is reminiscent of Art Deco or Victorian Revival jewelry, likely dating from the mid-to-late 20th century. The condition appears fair to good; there is visible tarnishing and patina on the silver-tone sections consistent with age, and some possible wear to the gold plating on the chain and frame edges. No obvious missing stones are detected from the image, but a physical inspection would be needed to confirm the security of all small marcasite settings. The craftsmanship shows a high level of detail in the casting and stone setting for a costume or semi-precious piece.