Although these specimens of antique jewelry set with emeralds may be numbered by the score or more in the museums and reliquaries of Europe, but very few engraved emeralds have descended to us from ancient times. This rarity is not due to the hardness of the stone, for the ancient lapidaries cut the difficult and still harder sapphire; therefore we must believe the statement of the early gem-writers that the emerald was exempted from the glyptic art by common consent on account of its beauty and costliness. Stones possessing a green color have been used for ornamental purposes from the very earliest periods of the social life of man. And as we review the archæological history of the human race, it would seem as though minerals of this hue had been especially selected among all others for ornamental purposes. For instances of this primitive selection, we will refer to the green stone hatchets found among the ancient tombs of Brittany; the axe heads of jade in New Caledonia; the green serpentine implements of Africa; the articles carved from green zoisite, revered among the Chinese from time immemorial; as well as the green jade and amazon stones, which the Mexicans wrought with wondrous skill into strange and grotesque forms, and which they prized above even their magnificent and matchless emeralds. It is also clearly evident that the emerald was discovered in very ancient times, and that it was early adopted in ornamentation, and was prized as among the most valuable of the gems, if not the highest in estimation, for its color and fancied virtues. Pliny was undoubtedly familiar with the true emerald, and expressed his satisfaction in the following language:-- “There is no color so pleasing to the eye as that of the emerald. Whoever delights in the verdure of herb and leaf must enjoy infinitely more the contemplation of emeralds; for no verdure can compare to theirs. They are the only stones that charm the eye without wearying it. It loses its lustre neither in sun nor in shade, nor in artificial light. It shines continually with the same soft glow.” In the time of Alexander, the emblems of authority of the Persians consisted of golden imitations of vines, loaded with clusters of emeralds, carbuncles, and other gems. At the famous marriage feast of Alexander and his eighty companions with their beautiful Persian brides, emeralds appear to have been the favorite gem used, and to have been esteemed above all other ornaments except the beautiful pearls of the Persian Gulf.