means A blue-to-green semiprecious stone, or the vivid greenish-blue color that takes its name from it.

from From Old French 'pierre turquoise,' meaning 'Turkish stone' — not because the gem came from Turkey, but because European traders first encountered it arriving through Turkish lands, carried along trade routes from its true sources in Persia and the Sinai. The 'turque-' element is simply the French word for Turkish. The color sense, naming a hue after the stone, came along much later in English.