The finest Turquoises have long come from Persia, from a locality not far from Nishapur, in the province of Khorassan. Here the mineral occurs in narrow seams in the brecciated portions of a porphyritic trachyte and the surrounding clay slate. There are several hundred mines in the region and the entire population of the town of Maaden derives its livelihood from mining and cutting the stones. It is said that $40,000 worth of stones are taken from these mines annually. A pound of stones of the first quality sells at the mines for about $400 and is worth more than double that price in Europe. There are other Turquois mines in Persia, but their product is comparatively small. “Persian Turquoises” have, however, the highest value of all. Other Oriental localities from which the gem Turquoises are obtained are Sinai, in Arabia, the Kirgeshi Steppes, in Siberia, and the Kara-Tube Mountains, in Turkestan. Egypt also furnishes large quantities of Turquois, which does not as a rule retain its color well. [Illustration: TURQUOIS. (New Mexico.) SPECIMENS LOANED BY FOOTE MINERAL CO.] Left column: Indian Amulet. Artificially polished. Natural. Center column: Waterworn. Waterworn. Right column: Artificially polished. Artificially polished. Natural. Turquois is not an uncommon mineral in the United States and many gems of fine quality have been obtained from mines within our borders. The oldest and best known mines are those at Los Cerrillos, New Mexico. This locality was long worked by Indians and Spaniards, as shown by the great extent of the excavations. There are pits two hundred feet in depth and piles showing that thousands of tons of rock have been broken out. Fragments of Aztec pottery, vases, cooking utensils, stone hammers, etc., are found at the mines, and trees of considerable size have grown over the once worked portions. Hence the beginning of the mine workings must at least date back prior to the discovery of America. The mines were worked more or less by Spaniards in the early part of the seventeenth century with the consent of the Indians, or at least without hindrance from them. In 1680, however, a large landslide occurred on the mountain at the mine, and many of the Indian miners were overwhelmed. Believing the Spaniards to be in some way responsible for the accident, and perhaps fearing that their gods were displeased, the Indians rose in their might and expelled the Spaniards from the region. It is one of the few instances in the history of Spanish conquest in America in which the Indians came off victorious. The Indians seem to have prized the Turquois highly as an ornament, rudely polishing it and using perforated pieces like the one shown in the plate for necklaces. They also decorated their idols and other objects of worship with pieces of Turquois. The mountain at which the Los Cerrillos Turquois mines occur