THE MOST EXPENSIVE STUFF IN THE WORLD

BBC Science Focus has done a little study on the cost of the most expensive things on Earth. Here are the seven materials with the steepest price tags:
1. Antimatter: $59.8 trillion per gram (* And there’s never any around when you need it.)
2. Nitrogen atom-based endohedral fullerenes: $134 million per gram
3. Californium-25 (used in nuclear reactors): $25.6 million per gram
4. Samples from the Bennu asteroid: $9.6 million per gram
5. Red diamonds: $4.7 million per gram
6. Emeralds, rubies, sapphires: $483,000 per gram
7. Helium-3: $96,000 per gram
* Number 8: Eggs, ammirite?