In 2011, the Royal Canadian Mint started production of a $5 sterling silver and niobium coin named Hunter's Moon in which the niobium was selectively oxidized, thus creating unique finishes where no two coins are exactly alike.
No 2011 a Royal Canadian Mint comezou a produción dunha serie de moedas de 5 $ de prata e niobio chamada Hunter's Moon, na que o niobio foi oxidado selectivamente creando acabados únicos para cada unha delas.