Did you do all the quest on the 2nd floor. the one with the 5 fallen? I learned them all last night on the 2nd floor before going down to the catacombs [3rd] Are you talking about the puzzle with the sigils?
I came here looking for the answer to the same question... since nobody posted the answer, I tried to figure it out on my own. I got it just now, but when I restarted the puzzle so I could write down the steps, I forgot what I just did... :(
1. Move the uppermost red on the left left, and on the right right. 2. Move the lowermost red gem on the right right, and the lowermost red gem on the left left. 3. Match the left blues and then the right blues. 4. Match the left reds, then the greens, and finally the reds.
1. In the uppermost row that contains reds, move the left one left, and the right one right. 2. In the lowermost row that contains reds, move the right one right, and the left one left. 3. Match the left blues and then the right blues. 4. Match the left reds, then the greens, and finally the reds.
For the follow-up question, "Yellow Bellied Goblin":
1. In the far left and far right columns, take the third red from the bottom and move it down. 2. Repeat for the second and second-from-last columns. 3. Match the rest of the reds vertically. 4. Match the blue gems. 5. Match the remaining yellow gems (by moving them outward, not inward, of course).