The electrum magicum is prepared as follows:– Take ten parts of pure gold, ten of silver, five of copper, two of tin, two of lead, one part of powdered iron and five of mercury. All these metals must be pure. Now wait for the hour when the planets Saturn and Mercury come into conjunction, and have all your preparations ready for that occasion […] Many wonderful things can be made of this electrum, such as amulets, charms, magic finger rings, arm rings, seals, figures, mirrors, bells, medals and many other things possessing great magical powers, of which very little is publicly known, because our art has been neglected, and the majority of men do not even know it exists.’
—Paracelsus