It’s great when contemporary jewellers are able to incorporate pieces from the past. In this case, it’s a mother of pearl gaming token, popular in many cultures, including in China and Europe, but no longer in use.
This bracelet, by Donna Chambers Designs, is made with the aforementioned chip taking centre stage, with (they note) gemstones available in any colour or shape. These look like amethyst, and this is priced at USD$300.