This is an expert taken from the book "Turquois" written in 1915, by Joseph Pogue, Memoirs of the National Academy of Sciences. Note the spelling of Turquoise is turquois in 1915. 

The turquois is today in wide use among Indians of the Southwest, and it forms one of their most cherished possessions. As in the past, it still finds a ceremonial as well as an ornamental application.

The Pueblo Indians find great pleasure in turquois and seldom is a well-to-do representative seen without ornaments of this material. Especially upon gala occasions and during ceremonies is this stone in evidence, and both sexes bedizen themselves with quantities of it. The turquois is most commonly fashioned into discodial and cylindrical beads and into various-size pendants of oblong, triangular, and keystone outline. The work is performed by rubbing the material on sandstone and polishing on finer material, and the turquoise objects are perforated with a bow-drill, usually tipped with a fragment of quartz or flint. The workmanship is rather crude and the finished piece is seldom symmetrical or highly polished. The beads are usually strung on cord, but sometimes on wire, and one or more strands of turquois are used for turquois necklaces, turquois bracelets, and more rarely turquois ear ornaments (earrings). Discoidal beads are most common; in some strands of turquois these alternate with cylindrical shapes, and pendants may be in inserted, especially towards the center, to give variety. Beads of coral and white shell are often combined with the turquois, although their introduction lessens the value of the string. Turquois pendants are frequently worn alone, suspended from the ears; indeed this is perhaps the most common ornament seen in the Southwest.