I converted a bunch in the fragmentizer, added a lot to the bank , but the number on my achievement appears stuck on '3'? Confused...

The counter on your achievement page doesn't work as far as I know, it will only update when you have enough for the achievement =)

I see! Thanks! So I can just put those crystals in the bank?

yup its fine it'll keep track in the bank

My count on my achievement page is not updating despite what is in my bank, but don't worry. Once you make a purchase It may work. :D

Thanks guys, I just got to putting 1000 crystals in the bank and it gave me the achievement!