I agree. There seems to be a sheen on it like you find on aqua aura, titanium aura etc which are stones which have been treated with various compounds to create the beautiful sheens and colours they have. I believe they are sprayed with eg titanium, gold etc at high temperatures to create the effect.
In addition, I believe I can see a few bubbles on the surface.
You could ask the folks where you bought it if that's available to you. Tougher to do if it was a gift.
It's a really pretty wrap to