Black Beaded Necklace with Filigree Clasp

This item is a single strand necklace composed of numerous spherical, black-colored beads, likely made of glass or a similar synthetic material given their consistent luster and lack of natural pearl irregularities. The beads appear uniform in size, estimated to be around 6-8mm in diameter, and are individually strung, possibly knotted between each bead, although this detail is not perfectly clear in the image. The spacing and stringing suggest a carefully crafted piece designed for durability and drape. The color is a deep, uniform black with a high-shine, glossy finish, reflecting light evenly. The most notable feature is the ornate, silver-toned box clasp. It is oval-shaped with intricate filigree detailing on its surface, indicating a level of decorative craftsmanship. The clasp shows some signs of use or age, with possibly light tarnishing or slight wear on its raised details. There are no visible maker's marks or signatures on the clasp from the provided image. The overall condition appears good, with no obvious chips or cracks in the beads or significant damage to the clasp. Based on the context provided, having belonged to the user's grandmother and mother (born 1936), and being stored for 40 years, this necklace likely dates from the mid-20th century, possibly 1950s-1970s, aligning with styles popular during those decades. The consistent quality of the beads and the decorative clasp suggest a well-made costume jewelry piece.