Removable Gems ?
You kill a mob at level 4, get a tier 1 gem for Max Health. You level up to level 8 but still using same equipment, You then kill a level 8 mob and get a tier 2 Max health gem, You cannot (as of now) remove the Tier 1 max health gem to then put on the Tier 2 ?
Usage would be the ability to upgrade the gem level on your gear without needing another piece of gear entirely.
Value would be extremely handy for Servers that give out multiple variations of Gems with same stat, just different amounts. Or if you have grinded for that piece of boss gear, you finally get it, and then later on down the road you want to change the gem you put on it initially.
This, i feel should be a core functionality due to the nature of not only humans (making mistakes, putting on wrong gem or something) or just wanting to be able to change Stats around to find a good balance without having to do some sort of spread sheet, just being able to move gems around on different slots to min max your stats.
I mean this could be implemented a few ways off the top of my head, you could require an item (mmo items made) that you "Spend" on the removal of the gem, Or option to cost a Specified currency, Or option to allow it to just be a free process. I dont know the coding of it but would basically just be the Opposite of whats already built as far as Applying the gem in the first place.