This glaze is called Strontium Crystal Magic. It looks almost like an enamel. It's mostly white with pinkish flecks and breaks orange where it is thinner. The surface is a silky matte. They are really very pretty.
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