What I don't get though is why bother allowing us to stack extra sigils if they aren't going to be used? I've got 18 sigils of power in my bags, and I figured that you could use extra sigils to get more gems (maybe not another 10 of each, but like 3 of each per extra gem or something). But no, apparently not. 10,000 gold please.
Ah well. I definitely won't bother gemming an LFR weapon if I happen to get it: my guild has killed both Tsulong and Shek'zeer on normal mode, so it's only a matter of time until I get one or the other (Gao'rei/Claws of Shek'zeer).