Giovanni Antonio Giobert also known as Jean-Antoine Giobert (October 27, 1761 in Mongardino - 14 September 1834 in Millefiori) was an Italian chemist and mineralogist who studied magnetism, galvanism, and agricultural chemistry.
He introduced Antoine Lavoisier's theories to Italy, and built a phosphorus-based eudiometer sufficiently sensitive to measure atmospheric carbon dioxide and oxygen.
He identified the correct composition of the mineral Gioberite, a form of magnesite (MgCO3) found in the Piedmont area.
He was made a knight (Cavaliere) for his work on the chemistry of indigo dyes.