Black and Transparent Glass Bead Necklace

This is a costume necklace, likely from the mid to late 20th century. It features a combination of deep black rounded beads and larger, flat, irregularly shaped transparent glass beads with a bluish-grey tint, possibly simulating smoky quartz or a similar gemstone. The transparent beads appear to have an internal gold or yellowish inclusion that gives them a shimmering effect when light passes through. The beads are strung together with small, gold-toned spacer beads between each black bead, and larger gold-toned rings or spacers separating the black beads from the larger transparent ones. The necklace closes with a gold-colored hook clasp, which shows some wear consistent with age and use, possibly minor tarnishing or plating loss. There are no visible maker's marks or signatures. The craftsmanship appears to be typical of mass-produced costume jewelry, with a focus on visual appeal rather than precious materials. The stringing seems secure, though the overall condition suggests it has been worn. There are no obvious chips or cracks visible on the beads, but a closer inspection would be required to confirm their integrity. The design is symmetrical, with the larger, irregular beads forming the central focal point of the necklace, including a single pendant bead hanging below the main strand. The piece is likely made of glass, metal alloy findings, and stringing material. Its estimated length appears to be choker to princess length, designed to sit relatively close to the neck.