This is the "Moor Pu Dekcuf" room with the twisting block puzzles.
Check out the video walkthrough if you're having problems.
Hidden Red Gems:
1. On the bottom of the first red block
2. On the platform that twists into place after lining up the two blocks
3. Down the stairs from the platform that twists into place after lining up the two blocks
4. On the bottom of the large block with the long set of stairs near the end