This doesn't mean that you should use a 30, 40, or 50 rank gem though. If you want to augment armor, the legendary gem you use must be at least rank 50.If you want to augment jewelry, the legendary gem you use must be at least rank 40.If you want to augment a weapon, the legendary gem you use must be at least rank 30.You should be taking your off stat gems (as in, if you are a Demon Hunter and don't use Topaz) and using Convert Gem to get them to your main stat type. These are the correlations for gems to stats:

+210 Dexterity (Caldesann's Despair Rank 42) So, for example, let's say you used a level 42 legendary gem with an emerald, the added blue stat would be: The end result is a unique blue stat name on your item called 'Caldesann's Despair' (the name of the cube recipe for augmenting), as well as the rank and bonus to the stat. They are one of the keys to progressing into the upper greater rifts.Īs the accepted answer states, you get +5 for every rank of the gem. These augments are extremely important for endgame content.

Reforge a legendary item diablo 3