Peter Schiff Bought Gold Mine in December: Up 80% In 1 Month

Something interesting that I heard on the Peter Schiff Show. Peter bought a gold mine in December and is up 80% right now. I looked at all gold mines out there and I could only find 3 gold mines:

1) Rubicon Minerals

2) Lakeshore Gold

3) Pretium Resources 

Any guess which one he bought?