For this gem, you should grab the Pardijn helper, who is located on the top of the bookshelf in the starting area.
With Pardijn in your helper inventory slot, go to the Ruigrijk area. Head right to the ship, represented by the ship wheel. In front of the ship are two long beams with planks scattered over the area. These planks are always in the same position. Grab the planks one by one and place them in the area between the two beams. Once all planks are placed, a walkway has formed that allows Pardoes to move to the ship.
On the ship, open the box that's in the middle of the screen and grab the coin. Then, go to the Marerijk area.
In Marerijk, take the middle path in the main area. You arrive at the flower pond. Go up the bridge in the middle to arrive at the 'music flower' puzzle. The goal of this puzzle is to put all the notes, one created by pressing one of the flower petals on the flower in order from lowest to highest. Currently the known combinations are:
- 2 4 6 8 1 3 5 7
- 3 7 8 5 6 4 2 1
- 5 8 1 2 4 3 6 7
If you mess up, it is faster to click on the middle of the flower to reset the puzzle.
When completed, Pardoes will walk out of the puzzle area and back to the pond. Ignore his pleas for escape and send him back to the flower. It will now move aside to open a path to the dragon. you can also enter this path as quickly as you like without fearing the game crashing.
At the dragon, select Pardijn out of your inventory and place her in the chest. After the dragon is done making googly eyes at her, do the same with the coin. DO NOT GRAB THE GEM too quickly, or the game will softlock. Wait a second when selection is possible, then grab the gem.