" This Sarah Perez had the most beautiful eyes in the world, those green eyes spangled with gold that you love so much: the eyes of Antinous. In Rome, such eyes would have made her a concubine of Adrian; in Madrid they helped her become the princess of Eboli ensconced in the bed of the king. But Philip II was extremely jealous of those wonderful emerald eyes and their delicate transparency, and the princess - who was bored with the funereal palace and the even more funereal society of the king - had the fancy and the misfortune to cast her admirable gaze upon the Marquis de Posa while she was leaving church one day. It was on the threshold of the chapel, and the princess believed herself to be alone with her camarera mayor, but the vigilance of the clergy was equal to the challenge. She was betrayed, and that very evening, in the intimacy of their bedroom, in the course of some violent argument or tempestuous tussle, Philip threw his mistress to the floor. Blind with rage he leapt upon her, tore out her eye and devoured it in a single gulp.
'Thus was the princess covered in blood - a good title for a conte cruel, that, which Villiers de l'Isle Adam has somehow omitted to write! The princess was henceforth one-eyed: the royal pet had a gaping hole in her face. Philip II, who had the Jewess in his blood, could not cleave so closely to a princess who had only one eye. He made amends to her with some new titles and estates in the provinces and - regretful of the beautiful green eye that he had spoiled - he caused to be inserted into the empty and bloody orbit a superb emerald enshrined in silver, upon which surgeons then inscribed the semblance of a gaze. Oculists have made progress since then; the Princess of Eboli, already hurt by the ruination of her eye, died some little time afterwards, of the effects of the operation. The ways of love and surgery were equally barbarous in the time of Philip II!
'Philip, the inconsolable lover, gave the order to remove the emerald from the face of the dead princess before she was laid in the tomb, and had it mounted in a ring. He wore it about his finger, and would never take it off, even when he went to sleep - and when he died in his turn, he had the ring bearing the green tear clasped in his right hand. "
― Jean Lorrain , Monsieur De Phocas