Store Fantastic Book Piece Purple Chunky Bracelet Art Deco

Offered is a super Art store Deco book piece bracelet. It is one of the most gorgeous pieces of jewelry I have ever owned. Features five large purple rectangles that are faceted and prong set. Separating the large stones are two deep purple small rhinestones. Set in gold metal. I am not that knowledgeable about jewelry but I can tell quality items. It has a safety chain which is only put on valuable items. I believe it is from the 1930s and is Art Deco in style. I can't find any markings other than possibly on the small round ring that the safety chain attaches to. My eyes can't make out anything that small. It is in excellent condition and would surely be noticed every time it was worn. 7.5” long.