You are correct.
However, the puzzle is in svartalf lands, and so you must think like a svartalf, who are known to be very upside-down in their thinking.
The crystals that shine are a hint to the order in which you click the crystals, but you should turn your thinking around.
Click here to view the secret text
×Write down what crystal makes other crystals shine, ending with the crystal that doesn't cause another crystal to shine. Put them in order, if you can.
Click here to view the secret text
×Now reverse it, that's the puzzle solution.