Land of Black Gold
The comical Italian opera diva first appears in "King Ottokar's Sceptre", and is also in "The Seven Crystal Balls", "The Calculus Affair", "The Castafiore Emerald", "Tintin and the Picaros", "The Red Sea Sharks", and would have appeared in the unfinished "Tintin and Alph-Art". She is played on radio in "Land of Black Gold" and in "Tintin in Tibet", Captain Haddock imagines her singing in "Flight 714 to Sydney," and mentions her famous aria in "Destination Moon." Although she is apparently one of the leading of her generation, the only thing that Castafiore is ever heard to sing are a few lines of her signature aria, "The Jewel Song" ("l'air des bijoux", from Gounod's "Faust"), always at ear-splitting volume (and violent force—certainly enough to part the Captain's hair, shatter glasses and a breeze enough to blow back a curtain in an opera box—"She's in fine voice tonight.").