My neuron necklace is designed after the tree-looking like cell, the multipolar neuron. Cells of the nervous system, called nerve cells or neurons, are specialized to carry “messages” through an electrochemical process. Did you know there are as many neurons in the human brain as stars in the Milky Way? That’s about 100 billion! sterling Silver 18K Gold Finish Neuron Pendant Necklace-stem Gift-Tree Of Life-Psychology Gift-Science Jewelry