Divination by means of pearls. A pearl was covered with a vase and placed near a fire, and the names of suspected persons were pronounced. When the name of the guilty one was uttered, the pearl was supposed to bound up and pierce the bottom of the vase.
"Margaritomancy." Encyclopedia of Occultism and Parapsychology. . Encyclopedia.com. (November 14, 2018). https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/margaritomancy
"Margaritomancy." Encyclopedia of Occultism and Parapsychology. . Retrieved November 14, 2018 from Encyclopedia.com: https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/margaritomancy