Can't pick up jewels – Nia: Jewel Hunter Review

Fun puzzle game that gets more challenging as you go on. but like other reviewers i cant seem to pick up the second jewel if there is more than one. (Often this is the blue gem) it seems like you cant continue to the 2nd stage if you don't have all the gems to place on the round stone?
Review by Rhnre on Nia: Jewel Hunter.