Platinum:

Platinum bullion and coin investors do not have a large selection of platinum coins from which to choose. Yet, the platinum bullion coins available come from the most prestigious mints in the world. Platinum Eagles are produced by the U.S. Mint, Platinum Maple Leafs by Canada's Royal Canadian Mint, and Platinum Koalas by Australia's Perth Mint.
Today platinum is a widely-used but extremely rare metal.  It is very important ... [more]