I believe that the stone is natural because of eye visible inclusions
If it’s natural - it’s definitely dyed, or oiled with a colored oil. You can see the color concentrations along the surface reaching inclusions. So possibly natural, but considered heavily treated. Not at all like traditional oiling /resin that are not colored.
Could still be a synthetic or simulated that’s been heavily treated.
Imo, only.
Could it be tourmaline?
...or "angelina jolie emeralds"
Is that a trade name? Like Linde star sapphire?