Each piece of real human brain has been preserved and enclosed in a small glass vial, adorned with your choice of crystal on the cap. It is permanently sealed, with added copper reinforcement around the glass.
Wet specimens are contained in 70% isopropyl alcohol, which is flammable and must be kept out of direct sunlight. 
All human brain pieces are acquired legally, after retiring from medical or scientific use. They are perfectly legal to own in the US, aside from Louisiana, and may not be imported across state lines to Georgia or Tennessee.
Each piece measures about 2 inches long and comes on an 18-inch antiqued copper chain.