Guild of Writers

Really lost on the order of buttons of the six symbols in the maze after the first journey cloth. Found the lift, made it work and the symbols there .

I was just wondering whereabouts the green crystal is... can't find it to save my life. Am assuming that the door can't be opened 'till I've found all 6. Have found four of the number button clues (3(!), 2, 4 and 6) but assume that by a process of elimination I could solve the last two -still, would ...