I think we could put a note at the bottom of this page saying something to the effect of "This may be one of the spells used by Molly Weasley on Bellatrix Lestrange during their duel in Harry Potter and the Deathly Hallows: Part 2." Bellatrix seems to visibly stiffen, like a statue, and her skin takes on a rocky appearance. Seems like an accurate representation of this spell. 126.96.36.199 20:45, August 20, 2011 (UTC)
Thanks to whoever found the Wonderbook source (I do belive credit goes to 1337star, though I am unsure). I could read parts of the text, and wondered if it was alright if I added what I could see as a quote:
"The Hardening Charm will turn an object into solid stone. This can be surprisingly handy in a tight spot. Of course, most students _____ (prefer?) to use this spell to sabotage their fellow workers' schoolbags or to turn a pumpkin _______ before someone bites into it."