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. The whole purpose of this is to just inch closer and closer to complete BiS (Best In Slot). You aren't able to augment twice to double the effect though, if you augment a second time it just overwrites the first augment.
So, a rank 50 legendary gem will give you an additional 250 to your main stat (chosen by normal gem type). The legendary gems are the important component in this recipe you receive +5 points to an attribute chosen by Flawless Royal gem (Amethyst for Vit, Ruby for Strength, Emerald for Dex, Topaz for Int, regardless of item type) for every rank of your legendary gem. So basically what this recipe does is it makes your current ancient item better.