[追記] Legendary Gems Sneak Peak

Legendary Gemのスニーク画像です。

画像はオフィシャルなものではありません。LGはアミュレットとリングにのみソケットすることが可能です。

ブルコメによると、Legendary Gemはまだテスト不足でPTRには実装されてないそうです。

[追記]
Cleaned-up list of legendary gems and their effects

データマイニングされたaffixのリストです。各ジェムの上段が”main”のaffixで下段が“second” もしくは “upgradable”なaffixになると見られています。

Gem of Damage after Elite Pack
Gain 30% increased damage for 20 seconds after killing an elite pack.
Increases damage against elites by 20%.

Gem of Increased Damage Against CCed Enemies
Increase damage against enemies under the effects of control-impairing effects by [{VALUE1}*100|1|]%.
Gain an aura that reduces the movement speed of enemies within 12 yards by [{VALUE1}*100]%.

Gem of Reduced Level Requirement
Could not find corresponding strings, but probably pretty self explanatory.

Gem of Mini-Conduit
15% chance on hit to gain a mini-Conduit buff, dealing [{VALUE1}*100]% weapon damage as Lightning every second to nearby enemies for 3 seconds.
While under the effect of the mini-Conduit, gain [{VALUE1}*100] increased movement speed.

Gem of Poison DoT Debuff
Poison all enemies hit for [{VALUE1}*100]% weapon damage over 10 seconds.
All enemies you poison take [{VALUE1}*100]% increased damage from all sources.

Gem of Deep Wounds
Critical hits cause the enemy to bleed for [{VALUE1}*100]% weapon damage as Physical over 3 seconds.
Gain Blood Frenzy, granting you [{VALUE1}*100]% increased Attack Speed for each bleeding enemy within 20 yards.

Gem of Holy Smite
15% chance on hit to smite a nearby enemy for [{VALUE1}*100]% weapon damage as Holy.
Periodically smite a nearby enemy.

Gem of Increased Attack Speed
[{VALUE1}*100|1|]% chance on hit to increase your Attack Speed by 2% for 3 seconds, stacking up to 10 times.
Also Gain [{VALUE1}*100]% Cooldown Reduction per stack.

Gem of Damage Reduction while CCed
While under any control-impairing effects, reduce all damage taken by [{VALUE1}*100]%.
Heal for [{VALUE1}*100]% of maximum life when hit by control-impairing effect.

Gem of Pet Crit Chance
Increase the Critical Hit Chance of your pets by [{VALUE1}*100]%.
Your pets are unkillable.

Gem of Stagger Damage
50% of all damage taken is instead staggered and dealt to you over [{VALUE1}|1|] seconds.
[{VALUE1}*100]% chance on kill to clear all staggered damage.

Gem of Steady Aim
Damage you deal is increased by [{VALUE1}*100|1|]% for every 10 yards between you and the enemy hit.
[{VALUE1}*100]% chance on hit to Stun the enemy for 1 second.

Gem of Primary Skill Hit Harder
Increase the damage of primary skills by [{VALUE1}*100]%.
Primary skills heal you for 2% of maximum health on hit.

Gem of Goldsplosion
[{VALUE1}*100]% chance on killing an enemy to cause an explosion of gold.
Gain [{VALUE1}*100]% increased movement speed for 3 seconds after picking up gold.

Gem of Increased Damage after Spending Resource
Gain 1% increased damage for 3 seconds after spending primary resource. This effect stacks up to {VALUE1} times. Gaining a stack refreshes all existing stacks.
Gain 1% increased Armor for every stack.