Unheated purple sapphire from Finewater Gems set in a size 5.5 Stuller ring. This is the same ring that ilovegemstones owned. For more pics and info visit the site below and her original thread. It has a tendency to color change from purple to bluish purple, and I see sparks of pink.
https://www.pricescope.com/community/threads/finewater-purple-sapphire-stuller-ring.276572/
https://www.pricescope.com/community/threads/reduced-to-1499-purple-finewater-sapphire-ring.274756/