This is a vintage Art Deco style necklace made of white iridescent and black glass beads. The necklace is not marked. It measures 23-1/2 inches long. The white beads have a wonderful iridescence that I could not pick up in my pictures. The necklace is in very good condition with no problems that I could find. However, it may need cleaning. Please let me know if you have any questions. Thanks for stopping by.