[Xanderfox]

Alexandrite was much more confused as "she" was 3 gems fused into one, and not fully as they all had their personalities separate and fell apart when they began to argue. Opal and Sugalite seemed much more stable (well Sugalite was nuts, so not really mentally stable) with a more full merge of personalities. Stevonnie's fusion is likely less full since Connie is human so Steven's crystal side will not incorporate with her and when you add the youth and opposite gender aspects and you likely create more of a mental division.