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Gem
,Added more known gem bonuses + fixed broken link
'''Gems''' return in [[Diablo III]], and they're set to be a much larger part of the game. The item type works just as it did in Diablo 2; Gems are still small objects that have no function on their own, which add various bonuses when placed in item sockets. The bonuses they grant have changed though, and there are many more quality levels of gems (14 in D3, vs. 5 in D2).
They can still be upgraded in a 3<1 ratio, though that process requires the [[Jeweler]], rather than the {{iw|Horadric_ube Horadric_Cube Horadric Cube}}, and it's widely suspected that gems will be used in more than items, with a use in the [[Talisman]] perhaps making them even more valuable.
* Information about {{iw|gems Gems in Diablo II}}.
==Known Gem Bonuses==
The only recently officially confirmed gem stats were seen on a normal (level 3) [[Emerald]], in the [http://www.youtube.com/watch?v=UNP8QiNbFmU Gamescom 2010 Artisan video]. That gem granted:
* Weapon: +4% Casting Speed.
* Helms: Attackers take 7 damage.
These changes are largely due to the game's different combat mechanics and character requirements, but were also somewhat required by the different itemization issues. For instance, [[Sapphire]]s in helms/armor grant +mana in Diablo 2, but +mana isn't a viable bonus in Diablo 3, since only the [[Witch Doctor]] has mana for a resource. Even considering that, the changes to the Emerald are quite large. In Diablo 2, most gems provided resistance in shields and elemental damage in weapons. Emeralds in D3 do neither of those things.
===Unofficial gem stats===
Recently a few more gems we're discovered through [[:Category:Ninja_Videos|ninja]] photos of the Blizzcon 2010 build.
Chipped [[Ruby]] (level 1) granted:
* Weapon: Spells deal 10% more damage
* Helm: +2% Chance to Block
* Other: +2 Strength
Flawed [[Amethyst]] (level 2) granted:
* Weapon: +0,03 Attacks Per Secound
* Helms: +3% Movement Speed
* Other: +2 to all Attributes
Flawed [[Sapphire]] (level 2) granted:
* Weapon: +3% Life Stolen per Hit
* Helm: 3% Better Chance of Finding Magical Items
* Other: +4 Willpower
As you can see, a level 1 Ruby grants +2 Strength, while a level 2 Sapphire grants +4 Willpower and a level 3 Emerald grants +7 Dexterity.
If we assume that all of the primary attributes are worth equally, then we can see that every upgrade of a gems level increases the bonus of it by roughly 150%. All of this is highly likely to change, since itemisation is one of the last things that gets done in the development of the game.