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Farming/Upgrading Legendary Gems and Crafting Normal Gems

Last updated on Sep 25, 2014 at 20:23 by Poyo 15 comments

Table of Contents

Equipping your character with the right gems is an important part of the game. Since gems can be unsocketed at will and higher level gems can be used on any character, spending gold to upgrade non-legendary gems or farming for legendary gems (and upgrading them) is never a waste. Once you have a gem, you have it forever.

1. Non-legendary Gems

Non-legendary gems or normal gems are of 5 possible types: Amethysts, Diamonds, Emeralds, Rubies, and Topazes. Each of this type of gems gives you different stat bonuses for different item slots.

Gem Type Stats on Helms Stats on Weapons Stats on Other Item Slots
Amethysts % Life Life per Hit Vitality
Diamonds Cooldown Reduction +Damage to Elites All Resistance
Emeralds Extra Gold Critical Hit Damage Dexterity
Rubies Bonus Experience Damage Strength
Topazes Extra Loot Thorns Damage Intelligence

At Level 70, the most basic gems you can find are Marquise gems, for example Marquise Emerald Marquise Emerald. You can upgrade these gems all the way to Flawless Royal Emerald Flawless Royal Emerald. All the gem types follow the same upgrade patterns, which we describe below for Emerald gems.

This means that to craft a single Flawless Royal Emerald Flawless Royal Emerald, you will need a total of 81x Marquise Emerald Marquise Emerald, 4x Death's Breath Death's Breath, and 9,800,000 Gold. Imperial gems do sometimes drop at Level 70, so having a few of those will lower the cost, but Flawless Royal gems remain an expensive craft. You also need to find the Jeweler's patterns for these gems, but they usually drop rapidly from Rifts and Bounties.

2. Legendary Gems

Legendary gems are obtained from Greater Rifts. You are guaranteed to get one every time you kill a Greater Rift Guardian. That said, an important restriction applies. If you already have a given legendary gem in your inventory, on your gear, or in your stash, you will not be able to obtain a second one (unless you store your first gem in another character's inventory).

In practice, this restriction is not a problem, because the gems have the Unique Equipped, so you cannot equip the same legendary gem twice, even if you manage to obtain it twice using the trick mentioned above. The restriction is actually rather convenient, because it allows you to get your legendary gems quickly, without running the risk of getting duplicate gems instead of the one you really need.

One of the legendary gems, Boon of the Hoarder, does not drop from a Greater Rift Guardian, but from Greed, inside Greed's Domain, the special level you can access by using the yellow portal that Treasure Goblins sometimes leave behind.

2.1. Upgrading a Legendary Gem

All legendary gems can be upgraded to give them better stats (or rather, more powerful effects). When you first loot a legendary gem, it has a rank of 0 and its special rank 25 effect is locked.

Upgrading a legendary gem increases its rank by 1 and is something you can do each time you finish a Greater Rift. Every time you defeat a Greater Rift Guardian, an NPC named Urshi will appear next to the corpse of the guardian. If you manage to kill the guardian before the time is up, Urshi asks you to choose between upgrading your gem or refunding you an upgraded Keystone of Trials (which you can use to enter a more difficult Greater Rift). If you do not manage to kill the guardian before the time is up, Urshi only proposes you to upgrade your gem.

Every time Urshi spawns, you can ask for 3 gem upgrades, so you can increase the rank of a given gem up to 3 times, or the rank of 3 different gems once. You need to keep in mind, though, that a gem upgrade is not a guaranteed operation. It has a chance to succeed, based on the gem's rank and the Greater Rift level:

  • 100%: Greater Rift Level higher than or equal to Gem's Rank + 10;
  • 90%: Greater Rift Level ≥ Gem's Rank + 9;
  • 80%: Greater Rift Level = Gem's Rank + 8;
  • 70%: Greater Rift Level = Gem's Rank + 7;
  • 60%: Gem's Rank + 6 ≥ Greater Rift Level ≥ 0;
  • 30%: Greater Rift Level = Gem's Rank - 1;
  • 15%: Greater Rift Level = Gem's Rank - 2;
  • 8%: Greater Rift Level = Gem's Rank - 3;
  • 4%: Greater Rift Level = Gem's Rank - 4;
  • 2%: Greater Rift Level = Gem's Rank - 5;
  • 1%: Greater Rift Level = Gem's Rank - 6;
  • 0%: Greater Rift Level ≤ Gem's Rank - 7.

The most efficient way to get a gem to rank 25 and unlock its special effect is to start by farming 9x Keystones of Trials, which drop off normal rift guardians. Then, proceed to complete Greater Rifts at Levels 13, 16, 19, 22, 25, 28, 31, 34, and 37. If you do the runs in this order, you will always have a 100% chance to upgrade your gem.

2.2. List of Legendary Gems

2.2.1. Bane of the Powerful

Bane of the Powerful Bane of the Powerful grants +20% increased damage for 30 seconds after killing an Elite pack. Each rank upgrade increases the duration of the buff for 1 second. After reaching rank 25, the gem grants +15% increased damage against Elites.

This gem is one of the best choices for aggressive builds capable of maintaining the buff, i.e., killing Elite packs at a steady pace.

2.2.2. Bane of the Trapped

Bane of the Trapped Bane of the Trapped grants +15% increased damage against enemies under control-impairing effects. Each rank upgrade increases the damage by 0.3%. After reaching rank 25, the gem grants an aura that reduces the movement speed of enemies within 15 yards by 30%.

The interesting thing about this gem is that it becomes self-sufficient at rank 25. The slow effect it applies on enemies activates the damage increase that the gem provides. Before you reach rank 25 with the gem, any build using control-impairing effects will greatly benefit from the damage increase.

Control-impairing effects are Blind, Charm, Confusion, Fear, Freeze, Hex, Immobilize, Slow, Stun, and Taunt.

2.2.3. Boon of the Hoarder

As said above, Boon of the Hoarder is a guaranteed drop from Greed in Greed's Domain. This special realm can only be reached through a yellow portal that Treasure Goblins sometimes leave behind when they die. This portal can only spawn in Adventure Mode and not while doing Nephalem Rifts or Greater Rifts. Only players in the party when the Treasure Goblin was encountered can enter Greed's Domain. This prevents you from inviting your friends you join your game and enter Greed's Domain.

Greed's Domain rewards a high amount of Gold (up to several hundred millions in T6), gems, and guaranteed legendary drops from the end boss: the Baroness of Greed. The boss uses Goblin Charge, a skill similar to the Butcher's Charge, just that upon reaching its destination, a Treasure Goblin spawns. If you slow down on damage on the boss and kill the Treasure Goblins during the encounter, you can get a lot of additional loot.

Boon of the Hoarder grants you a 25% chance to cause an explosion of Gold when killing an enemy. Each rank upgrade increases this chance by 1.5%. After reaching rank 25, you gain a 30% movement speed increase for 2 seconds after picking up Gold.

This gem makes all your Gold-related problems go away. The amount of Gold dropped increases with Gold Find and game difficulty. It is important to note that the item does not work in Greater Rifts.

2.2.4. Enforcer

Enforcer Enforcer increases the damage of your pets by 15%. Each rank upgrade increases the damage by 0.3%. After reaching rank 25 with the gem, pets take 25% reduced damage.

Enforcer affects Demon Hunter's (Companion Companion) and Witch Doctor's (Gargantuan Gargantuan, Fetish Army Fetish Army, Summon Zombie Dogs Summon Zombie Dogs) pets as well as various other skills such as Demon Hunter's Sentry Sentry, Monk's Mystic Ally Mystic Ally, Crusader's Phalanx Phalanx, Barbarian's Call of the Ancients Call of the Ancients, and others.

2.2.5. Gem of Efficacious Toxin

Gem of Efficacious Toxin Gem of Efficacious Toxin poisons all enemies hit for 2000% weapon damage over 10 seconds. Each rank upgrade adds 50% weapon damage. After reaching rank 25, all poisoned enemies take 10% increased damage from all sources.

The gem scales with Poison Elemental Damage and provides an overall damage increase to anything you damage (after rank 25). This makes the gem a great choice for most builds, except those that get more than a 10% increase in damage from other gems.

2.2.6. Gogok of Swiftness

Gogok of Swiftness Gogok of Swiftness grants you a 50% chance on hit to gain Switfness, increasing your Attack Speed by 1% for 4 seconds. This effect stacks up to 15 times. Each rank upgrade increases the chance on hit by 1%. After reaching rank 25, your character gains 1% Cooldown Reduction per stack of Switfness.

This gem is a great choice for any class build that benefits from Cooldown Reduction. Choosing Gogok because of its Attack Speed is a rather poor choice for increasing your Damage and you will likely benefit more from other gems.

2.2.7. Invigorating Gemstome

Invigorating Gemstone Invigorating Gemstone reduces all the damage you take by 30% when you are under control-impairing effects. Each rank upgrade increases the damage reduction by 0.4%. After reaching rank 25, the gem heals you for 20% of your maximum life every time you are hit by a control-impairing effect.

Control-impairing effects are Blind, Charm, Confusion, Fear, Freeze, Hex, Immobilize, Slow, Stun, and Taunt.

2.2.8. Mirinae, Teardrop of the Starweaver

Mirinae, Teardrop of the Starweaver Mirinae, Teardrop of the Starweaver grants you a 15% chance on hit to smite a nearby enemy for 2000% weapon damage as Holy. Each rank upgrade adds 40% weapon damage. After reaching rank 25, the gem automatically smites a nearby enemy every 5 seconds.

This gem is a great choice for melee characters and the damage it does scales with Holy Damage.

2.2.9. Moratorium

Moratorium Moratorium causes 25% of all damage taken to be staggered and dealt to you over 3 seconds. Each rank upgrade increases the stagger duration by 0.1 second. After reaching rank 25, the gem grants a 10% chance on kill to clear all staggered damage.

The gem smoothes out bursts of damage by turning a portion of it into damage over time. This does not increase your Toughness (unless you clear the damage over time with the rank 25 effect), but it makes you less likely to die from a single blow.

2.2.10. Pain Enhancer

Pain Enhancer Pain Enhancer causes your critical hits to make the enemy bleed for 1200% weapon damage as Physical over 3 seconds. Each rank upgrade grants +30% weapon damage. After reaching rank 25, the gem grants you +3% increased Attack Speed for each bleeding enemy within 20 yards.

The bleed provides an amazing damage increase and scales with Physical damage. The rank 25 effect is very beneficial when fighting large clusters of enemies, but almost useless against a single target.

2.2.11. Simplicity's Strength

Simplicity's Strength Simplicity's Strength increases the damage of your primary skills by 25%. Each rank upgrade further increases that damage by 0.5%. After reaching level 25, primary skills heal you for 2% of your maximum health on hit.

Most end-game builds attempt to play without primary skills, because they deal significantly less damage than your other skills, which makes Simplicity's Strength a rather poor choice for most builds. An exception can be made for Frenzy Frenzy Barbarian and Way of the Hundred Fists Way of the Hundred Fists Monk builds that rely on Depth Diggers Depth Diggers and primary skills as their main source of damage.

2.2.12. Taeguk

Taeguk Taeguk grants you 0.5% increased damage for 3 seconds every time you spend your primary resource. This effect stacks up to 20 times. Each rank upgrade increases the maximum amount of stacks by 1. Afte reaching level 25, you also gain 0.5% increased Armor for every stack.

Since Taeguk requires constant resource consumption, it is often hard to keep its effect up, unless you are playing a channeling spell such as Whirlwind Whirlwind, Strafe Strafe, or Tempest Rush Tempest Rush.

2.2.13. Wreath of Lightning

Wreath of Lightning Wreath of Lightning grants you a 15% chance on hit to gain a Wreath of Lightning, dealing 600% weapon damage as Lightning every second to nearby enemies. This effect lasts for 3 seconds. Each rank upgrade grants an additional 10% weapon damage per second. After reaching rank 25, your movement speed is increased by 25% while under the effect of Wreath of Lightning.

This gem is an excellent choice for melee classes and the damage it does scales with Lightning Damage.

2.2.14. Zei's Stone of Vengeance

Zei's Stone of Vengeance Zei's Stone of Vengeance increases the damage you deal by 4% for every 10 yards between you and the enemy hit, up to 20% at 50 yards. Each rank upgrade grants +0.05% damage and increases the maximum distance by 0.25 yards. After reaching rank 25, you receive a 20% chance on hit to stun the enemy for 1 second.

This gem is a great choice for any ranged class, as it provides a decent damage increase as well as crowd control once upgraded to level 25.

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