BNN had a discussion on Antimony which is a very rare mineral and the largest mine for this mineral is in China. The second largest is found in Newfoundland and it must not be listed on the TSX, anyway here is a article on it.
http://www.energydigital.com/Beaver-Brook-Antimony-Mine-Safety-comes-first-Newfoundland-antimony-mine-over-970-days_28701