*Need clarification*
Rival initial quest says, "Free 2 locked level one wind gems".
For this in my board, left with 2 level one wind gems which is locked, So did a free spawn and luckily got one wind gem level one in the first attempt itself and did the unlock for one wind gem. To the second locked wind gem, I wanted to try something different which is, using prismatic essence on the locked wind gem in the board and tried again by using a free spawn of one wind gem and removed the unlock. Surprisingly, after using "prismatic essence" converter unlocking doesn't count on the rival challenge quest. Quest says 1/2 instead of 2/2 to get complete. I know, it sounds very ugly and unnecessary move, but wanted to try it in this way. I don't know the reason for this behavior, though using essence converter and tried to unlock with level one wind gem on colorless gem (previously level one wind gem) which is locked.
So, my guess is state of the gem will be lost once using essence converter, quest doesn't worry about gem previous state(color).
I thought like, rival quest knows there will be two locked level one wind gems initially on the board and how it gets unlocked on the board no need to be bothered.