Turquoise Face Roller Introduction
What is Turquoise ? Turquoise is a collection of phosphate minerals of copper and aluminum, most characterized by opaque blue. There are also light blue, blue-green, green, light green, yellow-green, gray-green, pale white and so on. The general hardness is 5 to 6, the density is 2.6 to 2.9, and the refractive index is about 1.62. Under …