Many people think this color is Tiffany. The easiest way to differentiate these colors is Tiffany is more blueish, and Turquoise is more greenish. We want to tell you a bit more info about this incredible stone from our Blue Turquoise Stone Gradient cursor pack. Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and aluminum. It is rare and valuable in finer grades and has been considered a gemstone and ornamental stone for thousands of years owing to its unique hue.