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Gem
,Adding proper references
===Unsocketing Gem===
One key fact to consider is that in Diablo III, gems (and other socketables) can be removed from sockets, by the [[Jeweler]], <u>without losing the gem or the item</u>. (Though this may grow quite expensive<ref>[http://diablo.incgamers.com/blog/comments/more-blue-info-on-crafting-gems/Blue Post - Blues: IncGamers] </ref> with higher level gems.) This was not the case in Diablo II, where runes, gems, and jewels were in an item forever, or were destroyed by the unsocket recipe. This change fundamentally alters the upgrading project, since instead of gems sitting useless in your stash until they are all the way to the top level (as they did in Diablo 2), characters in Diablo III will be using their highest level gems all the time, and gaining considerable benefits from the gem.
If a character's goal is to gain a huge bonus from a L14 gem in their shield, they'll be using that type of gem at L9, L10, L11, and so on, as they slowly upgrade it towards L14. This should make the upgrading process seem a little less lengthy, especially as it will take weeks or months for each additional level of improvement with a high level gem.
==Known Gem Bonuses==
The only officially confirmed gem stats were seen on a normal (level 3) [[Emerald]], in the [http://www.youtube.com/watch?v=UNP8QiNbFmU Artisan Video from Gamescom 2010 Artisan video]. That gem granted:
* Weapon: +4% Casting Speed.
* Helms: Attackers take 7 damage.
Flawed (level 2) [[Amethyst]] granted:
* Weapon: +0,03 Attacks Per SecoundSecond
* Helms: +3% Movement Speed
* Other: +2 to all Attributes
As you can see, a Chipped (level 1) [[Ruby]] grants +2 [[Strength]], while a Flawed (level 2) [[Sapphire]] grants +4 [[Willpower]] and a level 3 [[Emerald]] (as seen in the Youtube video <ref>[http://www.youtube.com/watch?v=UNP8QiNbFmU Artisan Video - Gamescom 2010 Artisan video]</ref>) grants +7 [[Dexterity]].
It is possible that it is always the bonus granted from the gem a level below it + the level of the current gem that decides how much bonus a given gem gives to an attribute. So a Emerald would give 4 (the bonus to an attribute granted from a Flawed Emerald) + 3 (the level, 3 out of 14, of the Emerald) = 7.
A more complete formula to discover any attribute bonus simply from the level of the gem is (''n'' * (''n'' + 1) / 2) + 1, where ''n'' is the level of the gem (from 1 to 14).