As of yesterday, non-premium members in Fantage can no longer use Sapphires, the only existing gem for them you obtain rare items. So be ready to keep your rares, and not sell them to Lucky Bobs.
We have little info on this update (or bug) but here’s what I have so far.
Already obtained sapphires will stay in your gem inventory.
If you already earned them, they won’t be gone.
Credit: Huny62807 and Fantage Forum Members