Here are some beautiful 3D printed jewelry inspired by biomimicry and parametric design. Nervous System has been on the scene since 2007. The head designers Jessica Rosenkrantz and Jesse Louis-Rosenberg graduated from MIT and come from a variety of backgrounds such as Architecture, Biology, Design, Robotics, and Mathematics. Nervous System is a truly interdisciplinary, innovative, and collaborative project.
Check out Subdivison Bracelet, Regular Bracelet, and Diagrid Bracelet designs that are open-source and available on Thingiverse. If you are looking to print a gift yourself, these are a more wallet friendly alternative to the jewelry collection available on the online Nervous System store.