This glaze is called Xavier's Modified Warm Jade. It's not actually very green, but oh my goodness do I love this glaze. When it's thin, it's a translucent yellow. As it gets thicker, it transforms to a matte, opaque cool white. Once it gets thick enough (which is doesn't on these buttons), a translucent green sits on the opaque white.
If you are particularly interested in a specific button, please say so in the order note. I think they are all fantastic, but I understand that certain projects have very particular requirements.
My buttons are so fun. Check out the rest of them here: http://bit.ly/ceramicbuttons