Room of crystals puzzle. Asking for 3 crystals where 2 belong.

[Post New]by 32problems on Jun 30, 15 12:50 PM
I'm up to a spot that has two spaces for a crystal of two. It won't go into the spot. The prompt keeps saying that it's for three crystals. But it isn't. It won't work. Help!!!!

 
 
 
 
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