This is an incredible Huge Ammolite Cabochon. It has a gem grade resin coating over it to protect the natural surface. Ammolite is very fragile, when not coated with a protectant of some kind.
I took several pictures from different angles, because there is a ton of fire, and color change in this piece and it looks different from all angles. If you are unsure about it, message or email me and I will send you a video, so you can see the fire.
Ammolite is a rare, iridescent, gem-quality material cut from the fossilized shells of extinct sea creatures. Found only in the Bearpaw Formation in Alberta, Canada, this organic gemstone has a dazzling range of colors and patterns and is highly desired for cabochons and assembled jewelry pieces.
Ammolite is also known as aapoak (Kainah for "small, crawling stone"), gem ammonite, calcentine, and Korite.