This may seem like a tiny detail, but it could have major implications for Raven and the season two storyline, so before you scroll down, make peace with having this plot point SPOILED for you…
… LAST CHANCE …
Raven gets her signature red gem in S2 - in the middle of her forehead, right where it should be.
It wasn’t in doubt that Trigon was going to be defeated and lately it has been the case that the gem is where Trigon is held captive. So I don’t really see this as much of a “spoiler”. In fact the real spoiler is if she didn’t have the gem.