Great stuff katana!
Apparently all Rhino horn post 1945 is also recognisable by the microscopic radation isotopes of plutoniam & uranium that dont show up in the true pre.1945 vases & handles.{So it must be incoprated in the horn through foodstuffs rather than just existance.]
But Aldermston charge a few pennys to run such a test I suspect!
I presume its a true age test for anything organic from post 1945?
Spiral