From MMOChampion. Should make our lives all that much easier with less to keep track of and being able to transmute uncommon gems.

Transmutations
A few interesting changes were made to Transmutations in Cataclysm.
  • There's only one type of Meta Gem now, and it's now created with Uncommon quality gems.
  • You can create Rare gems by crafting herbs + Uncommon gems.
  • Volatile Life can be randomly transmuted into any other kind of Volatile element.
And of course, we want the Vial of the Sands!