Gem vendors

Common gems can be purchased from the following vendors for 2

•  Markus Scylan in Honor Hold
•  Reagan Mancuso in Thrallmar
•  Inessera on Aldor Rise, Shattrath City - checked, as at 28Jan2010, she does NOT sell gems, she sells designs.
•  Lisrythe Bloodwatch on Scryer's Tier, Shattrath City
•  Dealer Senzik in Stormspire

Color	Name	Effect
Red	[Bold Tourmaline]	+4 Strength
	[Delicate Tourmaline]	+4 Agility
	[Brilliant Tourmaline]	+4 Intellect
Yellow	[Smooth Amber]	+4 Critical
	[Subtle Amber]	+4 Dodge
Blue	[Rigid Zircon]	+4 Hit Rating
	[Solid Zircon]	+6 Stamina
	[Sparkling Zircon]	+4 Spirit

Some uncommon gems can be purchased from  Dealer Senzik in very limited-supply, for 4 each.

Color	Name	Effect(s)
Red	[Bold Blood Garnet]	+6 Strength
	[Bright Blood Garnet]	+12 Attack Power
	[Delicate Blood Garnet]	+6 Agility
	[Runed Blood Garnet]	+7 Spell Damage
	[Teardrop Blood Garnet]	+13 Healing
	[Brilliant Blood Garnet]	+6 Intellect
Yellow	[Gleaming Golden Draenite]	+6 Spell Critical
	[Smooth Golden Draenite]	+6 Critical
	[Subtle Golden Draenite]	+6 Defense
Blue	[Lustrous Azure Moonstone]	2 Mana every 5 seconds
	[Rigid Azure Moonstone]	+6 Hit Rating
	[Solid Azure Moonstone]	+9 Stamina
	[Sparkling Azure Moonstone]	+6 Spirit
	[Stormy Azure Moonstone]	+8 Spell Penetration
Orange	[Inscribed Flame Spessarite]	+3 Critical	+3 Strength
	[Reckless Flame Spessarite]	+7 Healing	+3 Intellect
	[Potent Flame Spessarite]	+3 Spell Critical	+4 Spell Damage
Green	[Dazzling Deep Peridot]	1 Mana every 5 seconds	+3 Intellect
	[Regal Deep Peridot]	+3 Defense	+4 Stamina
	[Jagged Deep Peridot]	+3 Critical	+4 Stamina
	[Radiant Deep Peridot]	+3 Spell Critical	+4 Spell Penetration
Purple	[Timeless Shadow Draenite]	+4 Spell Damage	+4 Stamina
	[Purified Shadow Draenite]	+7 Healing	1 Mana every 5 seconds
	[Shifting Shadow Draenite]	+3 Agility	+4 Stamina
	[Sovereign Shadow Draenite]	+3 Strength	+4 Stamina
	[Glinting Shadow Draenite]	+3 Hit Rating	+3 Agility

After phase 4 of the Shattered Sun Offensive, Shaani starts to sell all six types of Burning Crusade epic gems for 15  [Badge of Justice] each at the alchemy lab.