“If thrown into boiling water, the water cools immediately; hence this gem cools lust, calms madness and attacks of frenzy.”

“If thrown into boiling water, the water cools immediately; hence this gem cools lust, calms madness and attacks of frenzy.”

In the same work he gives a translation of the Lapidarium of Marbodus, or Marboeuf, Bishop of Rennes in 1081. Of the chrysolite, which is supposed to be the same as the topaz, this author says:⁠—