Vintage Silver-Tone Lattice Square Pendant Necklace

This item is a vintage-style pendant necklace featuring a geometric square design held by an open-link cable chain. The pendant is constructed with a distinctive lattice or snowflake-like pattern, characterized by open-work cutouts and a raised central element that appears to be a bezel-set stone or glass cabochon with a pale, possibly opalescent or frosted finish. The metal is a silver-tone alloy, showing significant evidence of age through oxidation and a dark patina, particularly in the recessed areas of the design. The reverse side of the pendant reveals a cast construction with some coarse finishing, suggesting it may be a piece of mid-to-late 20th-century costume jewelry. There is visible wear on the metallic plating, especially along the edges and high points where the base metal might be starting to show through. A small rectangular indentation is visible on the back of one the lattice arms, which may have once housed a maker's mark or signature, though it is currently illegible in the provided image. The overall craftsmanship indicates mass-produced assembly with a focus on Brutalist or Modernist aesthetics common in the 1960s-1970s.