This is finally the week we'll release our gadolinium and ytterbium ingots, each in our standard one troy ounce format. The Swiss chemist Jean Charles Galissard de Marignac is credited with the discovery of each of these rare earth elements, and we find it only fitting that we release both of them together again about 135 years later. Own what's rare!
http://www.rwmmint.com/products/ytterbium-yb
http://www.rwmmint.com/products/gadolinium-gd