Jewelry artist Margaux Lange made a a pair of custom necklaces for a woman working on her PhD in neuroscience. She says "we worked together to come up with the perfect anatomical/organ focused pieces (inspired by my "Like Breathing" necklace with the lungs.) " They are really both unique and quite appropriate for the budding biologist. Lange's jewelery uses bits and pieces from Barbie dolls to create interesting arrangements of lips, eyes, arms and more. If you like her style, check out her Etsy shop. Her web site has more about her custom made jewelry.