Question about Dungeon Chest rewards

Now, I have done about half of the dungeons (something about half). I have never attempted to do a dungeon twice. My question: if you have already gotten the chest reward the first time around, do you get it again if you complete the dungeon again?

Just asking in case someone has already done this, save me a few hours to doing one again. Thanks.

Yes you do, I've done Frostmaw twice, 2 diamonds first time, 1 diamond, 1 onyx gemstone second time.

Thank you. Didn't want to invest the time if I didn't get the spoils again.

Moderator, please close. Thank you again.