https://www.sciencealert.com/watch-what-happens-when-a-bullet-hits-an-unbreakable-prince-rupert-s-drop
WATCH: What Happens When a Bullet Hits an 'Unbreakable' Prince Rupert's Drop : ScienceAlert
Dec 30, 2016 - For those of you who aren't familiar with the Prince Rupert's drop, this weird, scientific enigma is a glass object that's created by dripping molten glass...
prince rupert s dropwatch what happens