This is a vintage dress clip made of pink and purple iridescent glass. There are also blue and green shimmers on the glass. The dress clip has raised rectangles on the top. It has a simple hook type clip on the back. This type of clip was simply slipped over the edge of the collar or neckline of a dress or shirt. It measures 1 inch in diameter. I cannot find any markings on it. The clip is in good condition with no problems that I can find. It may need cleaning or polishing. Please let me know if you have any questions. Thanks for stopping by.