Sotacus as quoted by Pliny distinguishes five kinds of hematite, each one of which possessed special medicinal virtues. The best was the Ethiopic, which was a valuable ingredient in lotions for the eyes, and for burns. The second kind was called androdamus and came from Africa; this was very black, and was exceedingly hard and heavy, whence its name “conqueror of man”; it was reputed to attract silver, brass and iron. If rubbed with a moistened whetstone it gave forth a red juice, and was considered to be a specific for bilious disorders. The third kind was brought by the Arabs; this gave scarcely any juice when rubbed with the whetstone, but occasionally a little of a yellowish hue, and was useful for burns and for all bilious disorders. The fourth kind was called elatite in its natural state and melitite when burned; and the fifth appears to have contained an admixture of schist. These shared in the general virtues of the hematite, three grains of whose powder, when taken in oil, would cure all blood diseases.[272] That the cause of the friendship between Hector and Dolon was the latter’s ownership of a hematite is asserted in the Greek Orphic poem “Lithica.” This statement must be derived from some annotation to the Iliad made in the Alexandrine schools, for Homer himself knows nothing of it. In the fateful encounter of Hector with Achilles, the form and aspect of Dolon are assumed by Athena to deceive Hector into the belief that his friend was at his side to aid him in the unequal struggle. The blood of Uranus when wounded by Kronos is stated in “Lithica” as the generating cause of hematite, and the stone is recommended as a cure for eye-diseases.[273] Jacinth A peculiarly stimulant and tonic effect exercised by the jacinth was noted by Ben Sina (Avicenna), and to this is attributed its value as an antidote for poisons. Not, however, to the material composition of the stone was this effect to be attributed, for it proceeded from the mass in the same way as did the virtue of the magnet. Hence Ben Sina is opposed to the theory that the natural warmth of the body acted upon the jacinth, when taken internally, producing a transmutation, dissolution and mingling of its substance with the volatile spiritual essence.[274] In Constantinople, at a time when the plague was exceptionally prevalent, the citizens used to wear jacinths, because of the special virtues these stones were supposed to possess as guardians against the plague. That jacinth amulets intended for therapeutic use were occasionally to be found in pharmacies, is attested by Ambrosianus, who states that a jacinth the size of a human nail, and set in silver, was kept in a “pharmacy in Poland.” This stone, if held to a wound, was said to prevent mortification.[275] [Illustration: JADE TONGUE AMULETS FOR THE DEAD. CHINESE