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280                       GEMS AND PRECIOUS STONES IN THE
quarters, in one instance, two of them fitting together. The ex­planation offered is, that the supply of the material having be­come exhausted, recourse was had to division, or a removal of a part from existing objects, evidently for the purpose of mak­ing others, perhaps to be buried with some dead chief, or to be be­stowed on new branches of the tribe, an object held sacred. Fully one-eighth was removed from the back of this adze, and the manner in which the instrument used in the removal was held has produced a rounded cut on each side, lending probability to the supposition that some abrasive was employed, drawn with a string held in the hands, or stretched across a bow. If the Aztecs knew of the existence of this sapphire, we can more read­ily understand how they worked so large a mass of tough and hard material. So far as the writer has been able to ascertain, no similar object of equal magnitude and archaeological interest exists. Neither the Humboldt celt, the Leyden plate, the Vienna adze, nor the one in the Ethnological Museum at Dresden, which weighs only seven pounds, and is entirely devoid of orna­mentation, can compare with it.
A jadeite breastplate was obtained in 1884, by a German en­gineer, from a tomb near Santa Lucia, Cotzulmaguapa, where Dr. Behrendt had made some extensive excavations and obtained a quantity of large engraved stones and other antiquities from the old temples and tombs of the ancient kings of Quiche, which exist in that neighborhood. It is 16 centimeters (6 1/2 inches) wide, about 12 centimeters (5 inches) high, 1 centimeter (2/5 inch) thick. The color round the edges is a grayish-green, while on the out­side, at the center, it is a light rusty brown, perhaps from burn­ing. By transmitted light, the color is a light apple-green. It has been drilled at two places on the back edges with holes 4 millimeters (1/5 inch) in width, and has been sliced or cut from some boulder, as the back edges show. At one place, there are evidences of an attempt to slit it. According to Dr. Valentini, the cutting represents a human face or mask, or rather the head­gear of a man, representing the symbol Achau, meaning " Ross " or " Lord ;" the head of the tribe (one of the most com­mon motives of the Maya, which is found at least a thousand times drawn and colored in the Maya codices) forming the walls.