I created this guide for personal use, for the sole purpose of leveling jewelcrafting on my alts to get the 375 JC sockets, figured I might share it for anyone that is interested in leveling to 400 with all materials ready to go, it goes without saying that the full list of materials does not have to be 100% accurate but it worked for 2 of my characters.
The last 50 levels for anyone that is interested in that is simply to craft whatever gems are available, and the last 25 something levels is the available Meta gems.
NOTE: If you don't feel like buying the design for the Moss Agate Pendant you can make Heavy jade Ring which costs roughly 30 iron bars, 15 jade and 10 extra bronze setting(20 extra bronze bars), it will also be alittle more expensive.
The design can be found inside the keep in Menethil harbor for alliance and from the jewelcrafting trainer in Orgrimmar.
FULL LIST OF MATERIALS 1-400
Copper Bar 40x
Malachite 10x
Bronze Bar 40x
Shadowgem 10x
Silver Bar 20x
Heavy Stone 20x
Moss Agate 10x
Mithril Bar 40x
Truesilver Bar 10x
Citrine 5x
Aquamarine 15x
Flask of Mojo 20x
Thorium Bar 22x
Star Ruby 10x
Large Opal 5x
Azerothian Diamond 10x
Huge Emerald 4x
Black Diamond 10x
Fel Iron Bar 5x
Golden Draenite 4x
Azure Moonstone 6x
Deep Peridot 3x
Flame Spessarite 20x
Bloodstone 20x (Or any equivelant)
As of 2019-05-27 the full price of these materials cost me roughly 2500 gold on Alliance
Great guide, just used it to level my JC, was cheap, quick and the materials required were almost 99% accurate because I had some bad luck with leveling using a specific item. Thank you!!!