That's an opal. They usually don't turn out that white, they're more on the pink/peach side. (If you click the link in my signature it leads to pics of my Opal to get an idea.) If you want to go in the solid white direction, you might have more luck with blizzards, which are charcoal and amel. They can sometimes grow a little bit of yellow, but they'll end up much more white than the Opals.
I have a pearl (snopal) female and a possible het anery male opal so hopefully in a couple yrs I will be producing more snopals. If you can't find a snopal then get a blizzard, they are common.