I agree with all the other posts about not being able to positively
identify turquoise from a picture. I have a small stash of natural
(untreated, undyed, unanythinged) Morenci, Az. turquoise and the
difference between pieces is huge, both in color and matrix pattern
even though they all come from the same area. That being said, if I
had to guess at your piece, It looks a great deal like some Chinese
Turquoise I have, both color and matrix pattern. My opinion only.
Jim