If it was equal to a level 3 it would be worth it. If it was something a lot better it could destroy a game. It's never fun in a group if one character has an overpowered character. It makes the others feel like why even play. Making those gems really powerful would do that. Not everyone has the funds or the time to make the posts to get those high level gems.
Edited: Kyrroeth on 2nd Mar, 2017 - 6:39pm
Yes I will view it and even if it gives one a unfair advantage that does not mean they will be too powerful to lose. Got to remember that with great power comes great responsibility and word will get around where some may want to come test their mettle against one so powerful.
How about "Anytime you take a full uninterrupted sleep all your hit points are restored."