Hi Oakdragon
I have a similar pendant which was sold to me as "blue moonstone". It is gorgeous but the energy feels more neptunian, more intense than moonstone (I love moonstone also). In fact it is a bit too intense for me to wear often although I'm getting more used to it. I took it to a gemstone store and they said it was Labradorite. Most labradorite that I've seen is more greenish but somewhere I read that high-quality labradorite can also be blue.
How does the stone feel to you? Do you enjoy wearing it? The shop I bought it at said that "blue moonstone" is a protective stone. Does it feel protective to you? I feel like this stone stirs up stuff, something, not emotions but something having to do with intuition.
--Myrrha