I'll be watching this primarily to see how the BitStone team goes through the invitational stage with minimum 50BTC per investor. Will the investors be publicized, private, or given the choice? If this invitational period is truly being held as a way to set price discovery based on demand, what is your plan to proceed if no interested investors choose to pony up 50BTC?

I know nothing about the precious gems market and thus won't be investing in the ICO myself, but I may attempt a mining play if it's worthwhile.

Good luck to the BitStone team.