tur·quoise /ˈtɝˌkɔɪz, ˌkwɔɪz/
Tur·quoise, Tur·quois n. Min. A hydrous phosphate of alumina containing a little copper; calaite. It has a blue, or bluish green, color, and usually occurs in reniform masses with a botryoidal surface. [Formerly written also turcois, and turkois.]
Note: ☞ Turquoise is susceptible of a high polish, and when of a bright blue color is much esteemed as a gem. The finest specimens come from Persia. It is also found in New Mexico and Arizona, and is regarded as identical with the chalchihuitl of the Mexicans.
Tur·quoise, a. Having a fine light blue color, like that of choice mineral turquoise.
n 1: a blue to gray green mineral consisting of copper aluminum
phosphate; blue turquoise is valued as a gemstone
2: a shade of blue tinged with green [syn: greenish blue, aqua,
aquamarine, cobalt blue, peacock blue]