Joseph (Joe) Anthony Mandarino OC, FRSC (20 April 1929 in Chicago, Illinois – 19 September 2007) was an American-Canadian mineralogist and crystallographer.
Known for having a "wit as sharp as the crystals he studied" and a "biting sense of humour",[citation needed] he was not shy about speaking his mind and had little tolerance for sloppy work.
Encouraged by one of his schoolteachers, he would make trips to see the mineral collection at the Field Museum of Natural History.
Following the completion of his studies at Michigan Tech, he worked as a mineralogist for the Allis-Chalmers Manufacturing Company in Milwaukee, Wisconsin.
From 1952 until 1954, he served as a First Lieutenant in the United States Air Force, including a stint in Goose Bay, Labrador.
He made 17 first descriptions of minerals, including barićite, denningite, hydroromarchite, keilite, kulanite, romarchite, marićite and walfordite.