Legendary Gems were first officially revealed in the Patch 2.1 preview blog back in June of this year. They will be added to Reaper of Souls in Patch 2.1, and are currently undergoing testing on the PTR.
The gems add special bonuses when socketed in rings and amulets (only on Characters and not on Followers), and can be upgraded in power via Urshi, the NPC who appears after Greater Rifts are cleared.
While the developers are calling them “legendary gems” these socketables have nothing in common with regular gems in stats or appearance, and are more analogous to the Rainbow Facet unique jewels of Diablo 2. The main difference in Diablo 3 is that these gems can only be socketed in jewelry, and the way the gems can be upgraded to improve their functions over time.
Legendary Gems Listing
While the Legendary Gems are still undergoing development on the PTR, their stats and bonuses are changing constantly. A major revision was created on July 15, 2014 with new or upgraded stats for almost every gem. The following are the most current details about Legendary Gems.
|Bane of the Powerful|
|Bane of the Trapped|
|Boon of the Hoarder|
|Bliz Note: As was discussed in another thread, allowing this this gem to rank up to +100% pet Crit would likely cause undesired gearing issues and probably be a little out of line.|
|Gem of Efficacious Toxin|
|Gogok of Swiftness|
|Mirinae, Teardrop of Starweaver|
|Bliz Note: This buff duration on this gem was chosen so that it’s easier to keep up with cheap spenders and not trivial with expensive spenders.|
|Wreath of Lightning|
|Zei’s Stone of Vengeance|
|Bliz Note: The max of 50 yards was added not because it was too powerful (even though it was too powerful), but so that you wouldn’t be incentivized to stay offscreen while your pets killed everything. At 50 yards, I expect you to be in range to actually still use your skills (crazy right?).|
Gem Upgrade Odds
The only way to upgrade a Legendary Gem is via Urshi, who only appears when a character defeats the Greater Rift Guardian after the 15 minute timer has expired. So players must fail to finish a Rift in time, but still continue on to clear it and kill the Guardian. (Who drops the same quality of loot in either case.)
The odds that a gem will be upgraded increase with each higher level Greater Rift completed in that game. There is also a chance that the gem will receive a double, triple, or quadruple upgrade, boosting it 1-4 levels in total. It’s yet not known if anything effects the chances of a double or bigger upgrade, and most fans suspect it’s pure RNG.
The Legendary Gem upgrade chances are displayed in the tooltip, so the following figures are not estimations, but are what the game actually says before each upgrade attempt.
- Rift Level 01 – Upgrade chance 21%
- Rift Level 17 – Upgrade chance 45%
- Rift Level 18 – Upgrade chance 46%
- Rift Level 19 – Upgrade chance 47%
- Rift Level 20 – Upgrade chance 49%
- Rift Level 21 – Upgrade chance 50%
- Rift Level 22 – Upgrade chance 51%
- Rift Level 25 – Upgrade chance 55%
- Rift Level 26 – Upgrade chance 56%
- Rift Level 27 – Upgrade chance 57%
- Rift Level 28 – Upgrade chance 58%
- Rift Level 29 – Upgrade chance 59%
- Rift Level 30 – Upgrade chance 60%
- Rift Level 31 – Upgrade chance 61%
- Rift Level 31 – Upgrade chance 62%
- Rift Level 33 – Upgrade chance 63%
- Rift Level 34 – Upgrade chance 64%
- Rfit Level 35 – Upgrade chance 65%
- Rift Level 40 – Upgrade chance 70%
- Rift Level 41 – Upgrade chance 71%
- Rift Level 45 – Upgrade chance 75%
- Rift Level 50 – Upgrade chance 79%
- Rift Level 69 – Upgrade chance 93%
- Rift Level 100 – Upgrade chance 100%
Blizzard’s John Yang explained the design theory behind Legendary Gems while they were being tested on the PTR, July 15, 2014.
First off, our philosophy on Legendary gems is that, when you pick one up for the first time, you should immediately want to use it, assuming it’s for your build, since some gems don’t apply to all builds/needs. This puts a minimum bar on the starting power level. After that, the power increase per upgrade is directly related to the frequency of upgrading, which is closely tied to the Greater Rift reward scheme and is still being iterated on. In the end, we’d like gems to be infinitely upgradeable when it makes sense, but not be outrageous.
Additionally, all Legendary gems have been disabled for followers. These powers were not designed for followers in mind, and this way we can ensure the gems are of a high power level because you can only have 3 equipped. In the future, if followers need avenues of advancement we would likely make Legendary gems specifically designed for them.
Now for the details. The existing stats you see on Legendary gems on the PTR today are somewhat placeholder. So, to steer further discussion in a direction that’s more in line with the next PTR build, here are the freshly tuned numbers (with some of my notes) for each gem.
Legendary Gems Gallery
This legendary gems guide can also be found in the Diablo Wiki where it can be updated by anyone in the community as and when Blizzard make changes to the game.