This item drops from Sahn Tidehunter, one of the new Champions of Pandaria. Using it buffs you with Shimmering Water which increases swim speed by 50% and allows underwater breathing for 10min. It also gives you a watery appearance.

Aqua Jewel - blood elf

Cymre goes into Predator mode

Aqua Jewel - rocket

Rocket mount

Aqua Jewel - turtle

Turtle

Aqua Jewel - poseidus

Poseidus

Aqua Jewel - pet

Does not extend to pets

Aqua Jewel - phoenix

Fly me to the Moon

beach costume

Wait, why am I wearing a shovel?

Things to note:

  • does not need to be worn
  • combat does not break the effect