Escape Haunted School

[Purp]

I have 2 gems

one in "H" in the desk, and one in "F" after you scare away the wraithe with a cross found in"L". Also a lighter in the organ pedal in "G".

Can't find the third gem or a place to use the lighter. EDIT: Found both the third gem and where to use the lighter.

in "K", where you light the candles next to the unfriendly blackboard and get the third gem.

Put the gems in

and get the mirror and give the mirror to the young lady in the opening scene (click the down arrow) and you will leave.

[Oscar Wilde]

You woke up locked in a haunted school. Look around and see what you can find to help you escape!

Play Here

Please use spoilers for hints and walkthroughs:
[spoiler=Title Here]Enter text here...[/spoiler]

Please do not post a video walkthrough for 7 days.