The Jewel Box Gem Thirty is a great addition to the Jewel Box family. Three Gem Thirty pieces sewn together makes a Gem Ten. When you substitute a three pieced Gem Ten in the existing designs you add a whole different flavor to your projects. You can also divide the Gem Five into six sections. As it's name implies it takes thirty pieces to complete a "circle". The Gem Thirty makes lovely projects by itself as well.