Nishaburi Ajami turquoise stone and Nishaburi tree

What is the difference between turquoise and noble?

Ajami turquoise has no streaks in it and is sky blue in color. This turquoise is very expensive and valuable. This turquoise grows inside the greasy and black stone and it is difficult to recognize and only the natives can recognize it. This turquoise remains like a pearl in an oyster. Ajami turquoise: It is round and large and has a pure turquoise in the color of garlic blue, which is the most expensive type of turquoise.