Mining

I used to have a substantial collection. I had everything bagged and labelled -- ore samples from every mine I had ever visited, and then some. But it was sitting in 5 gallon buckets taking up space, and everytime I moved (you move a lot as a geo -- "go where the rocks are!"), they'd just stay in the buckets and increase my moving costs haha.

So I gave my rock collection away a few years ago -- to my business partner, who is a geologist, so at least it went to a good home. He put them in glass display cases which are cool.