Vintage FBI National Academy Mounted Emblem Round Paperweight NA

Vintage FBI National Academy Mounted Emblem Round Paperweight NA This is a mounted emblem of some sort - the emblem looks like a very large enamel or metal pin/badge. It is professionally mounted on a white piece of maybe marble? It is fairly heavy so I am just guessing it is marble. It weighs approximately 5.5 ounces. Approximate measurements: Just the emblem 1.5"x1.25" Whole Paperweight 2.5"x2.5" This is vintage and in good shape - refer to pictures for condition.