I need YOUR help to identify those stones! Thanks!

This is a freeform peyote bracelet that I made for Etsy and called Arctica. The cabs that are used in it were bought from Firemountain Gems in a half-kilo pack of assorted stones. So far I have two guesses - it might be a sort of white opal mined in Russia under the name kaholong, or it might be a moonstone. The first guess comes from girls from a russian seed-bead site, the other one is a guess of a lapidary artist from a little shop in Stockholm. He even said that the stones are of superb quality and rare to find nowadays. I am a bit doubtful about his guess, since the pack of one pound has costed me only 12 US dollars. What do you say?


Stone Nr1:
Stone Nr2:
Stone Nr3:

And this is just a picture of it on our patio:



Thanks in advance!