Petrus Bonus

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Petrus Bonus (Latin for "Peter the Good"; Italian: Pietro Antonio Boni)[1] was a late medieval alchemist. He is best known for his Precious Pearl (Latin: Margarita Preciosa) or Precious New Pearl (Margarita Preciosa Novella), an influential alchemical text composed sometime between 1330 and 1339.[2] He was said to have been a physician at Ferrara in Italy, causing him to sometimes be known as Petrus Bonus of Ferrara or as Petrus Bonus the Lombard (Petrus Bonus Lombardus). An Introduction to the Divine Art (Introductio in Divinam Chemicae Artem) is also attributed to him but was printed much later, in 1572.


  1. ^ see [1].
  2. ^ Aldine edition 1546, edited by Janus Lacinius, a Calabrian.