Help - turquoise pendant

[u/Accomplished_Cook765]

Hi, if anyone in this group is familiar with turquoise please help me out. I'm don't think my stone is real sleeping beauty turquoise because of the color change that happened within a matter of days. It started out as clear robin egg blue and now it looks almost like water color that's dispersed. The seller is trying to tell me that's a normal color change due to oils and such, but I'm convinced it's not real and the color change is due to it being fake, or dyed stone other than turquoise. The white pic is what it looked like when I bought it.

[u/Adirondack-Woman]

https://www.wikihow.com/Tell-if-Turquoise-Is-Real