Lumina air-dry clay has some unique characteristics. Not only is it a polymer-based clay that does not require baking, it is translucent, flexible, durable and waterproof. It is also acid-free, so it can safely be used to create scrapbook embellishments.
Camille Young, who created the necklace shown below, has more experience with Lumina than I do...so please read her own comments on this unique clay.
Camille's comments about Lumina
This is a video Camille made to show people that the flower necklace she created out of Lumina clay is not as delicate as it looks