Alkahest

Historically, an alkahest is a universal solvent that has the power to dissolve any substance known to man, even gold. It also was speculated that the alkahest was in actuality the philosopher's stone, or the element that could turn anything into gold and would make a man immune to even death. A philosopher at his core, Balzac utilizes this mythological device to explore obsession and its effects. As the main character of the book, Balthazar Claes, is introduced to the mysteries and wonder of alchemy, his quest for the alkahest or the philosopher's stone begins. His determination quickly becomes a single-minded obsession. As he sinks deeper into his sole fixation he begins to ruin his life and that of his family.