When you buy 3D digital model beads you are getting the 3D model file associated to each image so you can print it in your 3D printer or at any online printing service at your country with any material, even metal. All the times you want! So you can make any jewel combining these digital beads.
Once you get your 3D file you can use any of the online 3D printing services available, here is just a short list of countries and services, but there are 3D printing services all over the world.