Question: what is the most precious rock you have studied so far?

Thomas Barrett answered on 10 Mar 2015:

Ooo Good question. I would say that it is a rock called Emmaville. There is only about 100 grams in the whole world and I have quite a bit of it!

I have held and looked at Moon rocks that the astronauts bought back to Earth but I don’t personally work on them. They are really cool however and I am jealous of my friends who get to use them 😛