1/4, 1/2 or 1 Grain Pure Osmium Metal in GRAINMINT Bullion card 99.9%

 Osmium 99.9% 1/4, 1/2 and 1 Grain Pure Osmium Metal Bullion Cards. They don’t come rarer than Osmium. And it is not only the rarest, but the densest stable element in the universe. It has a beautiful cold steely blue tinge and is very heavy to hold. When Osmium powder oxidizes in air, it can form osmium tetroxide, a very dangerous substance. For this reason, we only give solid osmium metal Crystalline. The first time ever Osmium has been sold in verified bullion cards. Take your pick of 1/4, 1/2 or 1 Grain. Grainmint always guarantees 3.6% EXTRA weight in our Non minted Bullion Cards.