Guide to finding gems on the auction house

All crafted socketable gems are named in a particular two-part pattern:
<Stat_prefix> <Gem_name>
Where 
;<Stat_prefix>
: A name that defines what stats the gem have. All gems with that name share those attributes, though the values will vary.
; <Gem Name>
: The base material used to make the (socketable) gem. The better the base material, the greater the resulting attributes.
Generally:
* Gems introduced with Mists of Pandaria have better stats than those from Cataclysm, Wrath of the Lich King or Burning Crusade
* Gems with a rarer item quality (, ) have better stats than those with lower quality.
To find the gem you want, you can search for the <Stat_prefix> part of the name, depending on what socket and stats you are looking for, then use the quality selector on the Auction House UI to specify what amount of the desired stats you want (and how much gold you are willing to spend). Alternately, you can choose in the subset of gem the color you want and specify the quality, then it will produce a longer list of gems you can choose from.
 Patch 4.0.1 revised the gem system to be a little simpler. Several stats were removed along with existing stats being moved to a different color, causing the corresponding green, orange, or purple gem to either be removed, changed, or added. Biggest change was hit rating, intellect, and dodge rating moved to blue, red, and yellow (previously yellow, yellow, and red) respectively. Yellow stormjewels were removed and mastery rating will premiere on yellow gems for patch 4.0.3a.
==Red Gems==
* Blood GarnetLiving RubyCrimson Spinel
* StormjewelsBloodstoneScarlet RubyCardinal Ruby
* CarnelianInferno RubyQueen's Garnet
* Pandarian GarnetPrimordial Ruby
Name 	Stat
Bold 	Strength
Brilliant	Intellect
Delicate 	Agility
Flashing 	Parry Rating
Precise 	Expertise Rating
==Blue Gems==
* Azure MoonstoneStar of EluneEmpyrean Sapphire
* StormjewelsChalcedonySky SapphireMajestic Zircon
* ZephyriteOcean SapphireDeepholm Iolite
* Lapis LazuliRiver's Heart
Name 	Stat
Rigid 	Hit Rating
Solid 	Stamina
Sparkling	Spirit
Stormy 	PvP Power
==Yellow Gems==
* Golden DraeniteDawnstoneLionseye
* Sun CrystalAutumn's GlowKing's Amber
* AliciteAmberjewelLightstone
* SunstoneSun's Radiance
Name 	Stat
Fractured	Mastery Rating
Mystic 	PvP Resilience
Quick 	Haste Rating
Smooth 	Critical Strike Rating
Subtle 	Dodge Rating
==Purple Gems==
"Matches a Red or Blue Socket."
* Shadow DraeniteNightseyeShadowsong Amethyst
* Shadow CrystalTwilight OpalDreadstone
* NightstoneDemonseyeShadow Spinel
* RoguestoneImperial Amethyst
 	Hit Rating 	Stamina 	Spirit 	PvP Power
Strength 	Etched 	Sovereign 	- 	-
Intellect 	Veiled 	Timeless 	Purified	Mysterious
Agility 	Glinting 	Shifting 	- 	-
Parry Rating 	Retaliating	Defender's	- 	-
Expertise Rating	Accurate 	Guardian's	- 	-
==Green Gems==
"Matches a Blue or Yellow Socket."
* Deep PeridotTalasiteSeaspray Emerald
* Dark JadeForest EmeraldEye of Zul
* JasperDream EmeraldElven Peridot
* AlexandriteWild Jade
 	Hit Rating	Stamina 	Spirit 	PvP Power
Mastery Rating 	Sensei's 	Puissant	Zen 	Infused
PvP Resilience 	Balanced 	Steady 	Turbid 	Vivid
Haste Rating 	Lightning 	Forceful	Energized	Shattered
Critical Strike Rating	Piercing 	Jagged 	Misty 	Radiant
Dodge Rating 	Nimble 	Regal 	- 	-
==Orange Gems==
"Matches a Red or Yellow Socket."
* Flame SpessariteNoble TopazPyrestone
* Huge CitrineMonarch TopazAmetrine
* HessoniteEmber TopazLava Coral
* Tiger OpalVermilion Onyx
 
 	Strength 	Intellect	Agility 	Parry Rating	Expertise Rating
Mastery Rating 	Skillful 	Artful 	Adept 	Fine 	Keen
PvP Resilience 	Resplendent	Willful 	Lucent 	Splendid 	Tenuous
Haste Rating 	Fierce 	Reckless 	Deft 	- 	Wicked
Critical Strike Rating	Inscribed 	Potent 	Deadly 	- 	Crafty
Dodge Rating 	Champion's 	- 	Polished	Stalwart 	Resolute
==Meta Gems==
* Earthstorm DiamondSkyfire Diamond
* Earthsiege DiamondSkyflare Diamond
* Starflare DiamondEarthshatter Diamond (not crafted, can only be bought)
* Shadowspirit Diamond
* Primal Diamond
While meta gems also use the "<Stat_prefix> <Gem_name>" naming scheme, there are many effect combinations, making a table by attributes impractical. See Meta gems for a full listing.
==Pearls==
* Jaggal PearlShadow Pearl
Both of these can be crafted into purple 'Purified' gems (Spell Power and Spirit)
* Northsea PearlSiren's Tear
Both of these can be crafted into prismatic Enchanted varieties that add a value to all stats.
==Enchanting created Gems==
* Prismatic SphereVoid Sphere
These grant additional resistance to all realms of magic.
Category:Auctions
Category:Guides
Category:Socketable gems