The 25 milligram Prairie Dog Aurum® gold bill is a special, limited-edition add-on to the existing Natural Treasure Aurum® series (which would complete the collection for a total of six bills). The bill showcases a Prairie Dog in Pawnee Butte, located in Northeast Colorado. On the front side of this bill, an observant and social prairie dog is featured as a large profile on the right and a small reverse in the lower left. In the upper right corner, there are pure gold paw prints showcasing the small but mighty prairie dog’s classic gait. Multiple levels of micro-printing and security elements have been embedded throughout the artwork.

The 50 milligram Bald Eagle Aurum® gold bill is the second smallest gold bill in our Natural Treasure series. This bill showcases the noble North American bald eagle displaying its majestic six-foot wingspan. Multiple levels of micro-printing and security elements have been embedded throughout the artwork on both sides of the bill.

The 250mg Mountain Lion Aurum® Gold Bill is the fourth-largest bill in our Natural Treasure Aurum® series. This bill showcases a graceful yet powerful mountain lion in its native landscape. Known by more than 60 names, including the puma and the cougar, the mountain lion is a largely solitary animal and the most widely distributed mammal in the western hemisphere. Multiple levels of micro-printing and security elements are embedded throughout the artwork.

The 500mg North American Brown Bear Aurum® Gold Bill is the second-largest bill in our Natural Treasure Aurum® series. This bill showcases the brown bear in its native landscape, overlooking a large body of water against a forested backdrop. Multiple levels of micro-printing and security elements are embedded throughout the artwork.