Find the Gems and Power Source

Here is the journal, translated for you to read on your own. The crux of it says dwarves hid the ruby, the troggs hid the topaz, and a trogg named Grimlok has the sapphire.

Look - you're going to need a power source to make the necklace work again. Dran Droffers doesn't know this. To find one, here's what I'd do: go as deep as you can in Uldaman and kill whatever construct there is the strongest. No doubt whatever that is would have it.

When you have everything collected, come back here!

You've got another trip into the depths of Uldaman in store for yourself if you don't have the gems and a power source capable of channeling magical power back into the necklace.

You'll be getting the gems back to deliver to the goons in Orgrimmar; I will be keeping the power source, since it will be the thing that will make the necklace work in the first place...

Very well done, <class>. Now the fruits of our redirection will pay themselves out handsomely. I'm finished with the necklace itself, and I am confident I can duplicate the construction process consistently.

But first, I will use a specially prepared incantation to quickly analyze those gems before you take them and the necklace back to Orgrimmar. This will take just a brief moment to do.