Challenges are one of the hottest crafting trends, so we put a who's who of modern jewellery artists to the test. Chosen for their different aesthetic visions, 30 designers (including Todd Reed and Joanna Gollberg, among others) received a box containing nine jewellery supplies with the request that they create a piece using only those items, plus one wild card material of their choice. These are their show stopping designs, complete with how-to steps for making them.