Myself, I find ametrine and citrine like a dose of amphetamine! I only use it when I really need energy!
Prehnite can be energising and calming at the same time, much as Labradorite is. I agree with Stonesatiety, garnets are very clearing and grounding, and repel anxiety by giving confidence.
Also agree with Briar Rose, rubies are awesome for grounding
They give you a stable energy with no super highs or super lows. But you still feel a sustaining and steady lift. And it is calming, as it is so stable. It's nice!
Might want to try Chalcedony as well, if you really want to be *very* calm and loving
It comes in several colours...apple green is nice!