50 Roubles Bison

Belarus launched an ambitious wildlife bullion-and-gemstone series in the 2000s, embedding small diamonds into collector coins as a deliberate strategy to attract high-end foreign buyers — hard currency acquisition was the practical motive, conservation branding the cover story. The National Bank issued these through authorized dealers at substantial premiums over melt, and secondary market prices have historically tracked more on collector sentiment than on gold spot.

The two VS-clarity diamonds are set into the die-struck field rather than applied post-strike, a production detail that created recurring quality-control headaches for the Minsk minting contractor.