Ema raised her hand. "Sir, someone might want to turn something into stone for a weight, if they need something quickly and they aren't by any rocks. They could also turn something to stone to make it more valuble, or turn something into stone to make a house or something...an easy way to make it look impressive, maybe?" Ema wasn't sure where she was going with this. "Wizards could certainly turn wooden objects into stone and sell them to muggles for more than it's worth."

Well, it was possible...right?

"Or they could just turn something into stone to protect them...like, if fire was coming at them they could turn the thing in front of them into stone and protect them a little bit, even if the fire is uncommonly strong. In other words, it could also be used for denfensive purposes."