Borrowed from Arabic لَاطُون (lāṭūn, “copper, copper alloy”), itself ultimately of Turkic origin, from Old Turkic 𐰞𐱃𐰆𐰣 (l¹t¹un¹, “gold”). Compare Turkish altın, Karakhanid اَلْتُونْ (altūn, “gold”).
Practice speaking and memorizing "latón" and many other words and sentences in Spanish.