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136         THE MAGIC OF JEWELS AND CHARMS
mineral and vegetable poisons.48 In Mexico the emerald 46 bore the name Quetzalitzli, "stone of the quetzal," because its color resembled the brilliant green of the plumes of the bird called in the Mexican tongue quetzal. These plumes were worn as insignia of royalty by the sovereigns of Mexico and Central America, and hence the emerald was regarded as an essentially regal gem, although its use was not con­fined to royalty.
The tincture of emerald is recommended by the Arab physician Abenzoar as an internal remedy for the cure of dysentery, the dose prescribed being six grains. He also claims to have cured one of his patients suffering from this disease by making him wear an emerald.47 This illustrates the use of the stone in Moorish Spain in the early part of the eleventh century, the period of the highest development of Moorish civilization, for Abenzoar, or Abu Meruân, as he is sometimes called, was born in Seville about 1091 a.D. and died in 1161 or 1162.
The curative properties of the hematite were generally recognized by the early writers, and in this case they were not so much at fault, as this substance possesses consider­able astringent properties. Galen recommends its use for inflamed eyelids, following in this the teachings of the Egyp­tian schools of medicine. If there were tumors on the eyelids, the hematite was to be dissolved in white of egg, and if the tumors were very large it was to be boiled with fenugreek (foenum graecum) ; if, however, there were no tumors, but simply a general inflammation of the eyelids, a
"Garbe, "Die indische Mineralien"; Naharari's "Kajanighantu," Varga XIII, Leipzig, 1882, p. 76.
"The emerald of Mexico was evidently the jade or the piedra del hijada.
*' Gabriel Colin, " Avenzoar, sa vie et ses œuvres," dissertation for doctorate in Univ. of Paris, 1911, pp. 164, 165.