The virtues of the hematite were praised in an ancient gem-treatise written by Azchalias of Babylon for Mithridates the Great, King of Pontus (d. 63 B.C.), a sovereign who was passionately fond of precious stones, and possessed a splendid collection of them, both engraved and unengraved. Azchalias, as cited by Pliny[97] taught that human destinies were influenced by the virtues inherent in precious stones, and asserted that the hematite, when used as a talisman, procured for the wearer a favorable hearing of petitions addressed to kings and a fortunate issue of lawsuits and judgments. It is a red oxide of iron, which when abraded shows a red streak; whence the name hematite, from the Greek _haima_, “blood.” As an iron ore and hence associated with Mars, the god of war, this substance was also considered to be an invaluable help to the warrior on the field of battle if he rubbed his body with it. Probably, like the loadstone, it was believed to confer invulnerability. The high degree of skill possessed by the Pueblo workers is strikingly shown in a finely inlaid hematite cylinder found in Pueblo Bonito. The inlays are of turquoise and are designed to make the cylinder a conventional representation of a bird. The wings are indicated by turquoise inlays of pyramidal outline, curved so as to follow the curvature of the cylinder, the head being figured by a conical piece of turquoise attached to one end. This conical termination bore a small bird-figure carved in relief.[98] When we consider the difficulties the Indian workers had to overcome in the execution of this artistic task with the tools at their command, we can well realize that this object, probably an amulet, must have been considered very valuable, and was most likely the property of some one of high rank in the tribe or community. Jacinth The jacinth was more especially recommended as an amulet for travellers, because of its reputed value as a protection against the plague and against wounds and injuries, the two classes of perils most feared by those who undertook long journeys. Moreover, this stone assured the wearer a cordial reception at any hostelry he visited.[99] It was said to lose its brilliancy and grow pale and dull if the wearer or any one in his immediate neighborhood became ill of the plague. In addition to these qualities the jacinth augmented the riches of the owner, and endowed him with prudence in the conduct of his affairs.[100] St. Hildegard, the Abbess of Bingen (d. 1179), gives the following details as to the proper use of the _jachant_ (jacinth):[101]