Pearls, writes Jean de Renou (1607), "are greatly cordial and rejoice the heart. The alchemists consequently make a liquor of pearls, which they pretend is a marvellous cure for many maladies. More often than not, however, their pretended liquor is nothing but smoke, vanity, and quackery. I knew a barber in this city of Paris who was sent for by a patient to apply two leeches, and who had the impudence to demand six crowns of gold for his service. He declared that he had fed those leeches for an entire month on the liquor of pearls."
It is on record that Pope Clement VII took 40,000 ducats' worth of pearls and other precious stones with unicorn's horn within fourteen days. (See Mrs. Henry Cust's "Gentlemen Errant.")
Emeralds had a great reputation, especially on account of their moral attributes. They were cold in an extra first degree, so cold that they became emblems of chastity, and curious tales of their powers in controlling the passions were told. Moses Maimonides, a famous Jew who lived in Egypt in the twelfth century, in a treatise he wrote by command of the Caliph as a concise guide in cases of venomous bites or poisons generally, declared that emeralds were the supreme cure. They might be laid on the stomach or held in the mouth or 9 grains of the powdered stone might be taken in wine. But recognising that emeralds were not always handy when the need arose, Moses names a number of more ordinary remedies.
Confection of Hyacinth was a noted compound formulated in all the old pharmacopœias, and regarded as a sovereign cordial, fortifying the heart, the stomach, and the brain; resisting the corruption of the humours and the malignity of the air; and serving for many
