A jasper engraved with the famous Gnostic symbol was set in the ring worn by Seffrid, Bishop of Chichester (A.D. 1159). This ring was found on the skeleton of the bishop and is now preserved in the treasury of the Cathedral of Chichester. Undoubtedly the curious symbolic figure was given a perfectly orthodox meaning, and, indeed, it was not really a pagan symbol, as the Gnostics were “indifferent Christians,” although their system was a fanciful elaboration of the doctrines of the late Alexandrian school of Greek Philosophy and an adaptation of this to the teachings of Christian tradition. In many cases, however, gems with purely pagan designs were worn by Christians, designs such as Isis with the child Horus, which was taken to be the Virgin Mary with the infant Jesus.
A curious amulet, apparently belonging to the Gnostic variety, and intended to bring success to the owner of a racehorse, is now in the collection of the Metropolitan Museum of Art, in New York. The material is green jasper with red spots. On the obverse the horse is figured with the victor’s palm and the name Tiberis; on the reverse appears the vulture-headed figure of the Abraxas god and the characters, “ZACTA IAW BAPIA,” which have been translated, “Iao the Destroyer and Creator.”[187] Possibly this amulet may have been attached to the horse during his races to insure victory, as we know that amulets of this kind were used in this way.
As illustrating the eclectic character of some of the amulets used in the early Christian centuries, we may note one in the Cabinet de Médailles, in Paris. This has upon the obverse the head of Alexander the Great; on the reverse is a she-ass with her foal, and below this a scorpion and the name Jesus Christ. Another amulet of this class, figured by Vettori,[188] also has the head of Alexander on the obverse, while the reverse bears the Greek monogram of the name Christos.
After the third or fourth century of our era the art of gem-engraving seems to have been lost, or at least to have been very seldom practised, and it is noteworthy in the matter that after this period writers who treat of the virtues of engraved gems as talismans rarely, if ever, use the words “if you engrave” such or such a figure on a stone, but write “if you find” such a figure.
The figures engraved on precious stones were supposed to have a greater or lesser degree of efficacy in themselves independent of the virtues peculiar to the stone on which they were engraved, and this efficacy depended largely upon the hour, day, or month during which the work was executed. For the influence of the planet, star, or constellation which was in the ascendant was thought to infuse a subtle essence into the stone while the appropriate image was being engraved. However, to exert the maximum power, the virtue of the image must be of the same character as the virtue inherent in the material, and the gem became less potent when this was not the case. Certain images, those symbolizing the zodiacal signs for instance, were looked upon as possessing such power that their peculiar nature impressed itself even upon stones inherently of different quality; others again were only efficacious when engraved on stones the quality of which was in sympathy with them.[189]
Naturally, many of the ancient gems which had been preserved from Greek and Roman times were recognized as being purely products of art, but in medieval and later times the idea of the magic quality of all engraved gems had become so deeply rooted that in many cases a magical character was ascribed to them entirely foreign to the intention of the engraver. Great ingenuity was often displayed in seeking and finding some analogy between the supposed significance of the design and the fancied power of the stone itself. Taking the agate as an illustration, Camillo Leonardo says that its many different varieties had as many different virtues, and he finds in this an explanation of the multiplicity of images engraved on the various kinds of agate, without realizing that the true reason was that this material lent itself more readily to artistic treatment than did many others.
The idea that some special design should be engraved upon a given stone became quite general in the early centuries of our era. The emerald, for instance, according to Damigeron, was to be engraved with a scarab, beneath which was to be a standing figure of Isis. The gem, when completed, was to be pierced longitudinally and worn in a brooch. The fortunate owner of this talisman was then to adorn himself and the members of his family, and, a consecration having been pronounced, he was assured that he would see “the glory of the stone granted it by God.”[190] Possibly this may have meant that the stone would become luminous.
A list of these symbolic designs is said to have been given in the “Book of Wings,” by Ragiel, one of the curious treatises composed about the thirteenth century under the influence of Hebrew and Greco-Roman tradition. Although it owes its origin to the Hebrew “Book of Raziel,” it bears little if any likeness to that work. As will be seen in the following items, the fact that the design is on its appropriate stone is always insisted on:
