Turquoise is a kind of copper-aluminum phosphate minerals containing water, which is common in blue, green, turquoise, yellowish green, dark blue, sky blue, light blue and turquoise. Location: Hubei, Anhui, Shaanxi, Gansu and other provinces. The characteristics of turquoise jewelry include:

1. Color: Turquoise presents a variety of colors, among which blue, green, blue-green and yellow-green are the main colors.

2. Structure: Turquoise is a porous and hydrophilic gem, which has a crystal structure when observed under a microscope.

3. Density: The relative density of turquoise is 2.4~2.9, and the standard value is 2.76.

4. Refractive index: The refractive index of turquoise is 1.6 1~ 1.65.

5. Gloss: The fracture of turquoise is oily glass luster.

The above information is for reference only. If you need to know more about turquoise, I suggest you consult a professional.