|Muggles' Guide to Harry Potter - Magic|
|Features||Turns soft things hard|
|First Appearance||Harry Potter and the Deathly Hallows|
The Duro spell turns things to stone.
This spell was used by Hermione to allow her, Harry, and Ron to escape pursuing Death Eaters. Having turned a staircase into a slide, the Trio passed through a tapestry at the bottom. Hermione then turned the tapestry to stone to disable the Death Eaters following; we hear the crunch as they hit the back of the tapestry.