is called Mount Chalchihuitl, in allusion to an Indian name that is supposed to have been applied to Turquois. The mountain is evidently of volcanic origin. The color of most of the Turquois from this locality is apple-green rather than the highly prized blue, but some gems of a good blue have been obtained. Mr. Geo. F. Kunz, writing in 1890 of the sale of gems from this locality, says that the Indians usually dispose of them at the rate of twenty-five cents for the contents of a mouth, which is where they usually carry them. Several other localities in New Mexico are worked for Turquois. In Cochise County, Arizona, is a locality known as Turquois Mountain, where considerable mining is carried on. Turquois is also mined in Gila County, Arizona; Lincoln County, Nevada, and San Bernardino County, California. Several of these localities have been opened up recently, the present popularity of the gem perhaps having stimulated its output. The much higher price commanded by Turquois of a blue color has led to a counterfeiting of this color by staining green Turquois or other stones with Prussian blue. Mr. Geo. F. Kunz in his “Gems and Precious Stones of North America” describes a method of detecting this stain. It consists in washing the stone with alcohol and, after wiping it, to remove any grease, laying it for a moment in a solution of ammonia, when the blue color, if artificial, will largely disappear. At how early a date Turquois began to be prized as a gem is not known. The word Turquois is a French word meaning Turkish, or a Turkish gem, and came to be applied because the gem was introduced into Europe by way of Turkey. It is probable that the gem has been in use from the remotest past among Oriental peoples and it is certainly still highly prized by them. Not the least of the reasons for which it is held in high esteem by them as well as by many Occidental individuals is the good fortune it is supposed to bring to its possessor. One of the proverbs of the Orientals is, “A Turquois given by a loving hand carries with it happiness and good fortune,” and another, “The Turquois pales when the well-being of the giver is in danger.” Numerous other superstitions cling around the Turquois. One of these, due probably to slight changes of color which the stone may undergo under certain climatic influences, is that if the owner of a Turquois sickens it will grow pale, and at his death lose its color entirely, but it will regain its color if placed on the finger of a new and healthy master.