Interesting explanation of Prince Rupert's Drops with  FEB 19 2008

Interesting explanation of Prince Rupert's Drops with accompanying video demonstration.

The very high stress within the drop gives rise to unusual qualities, such as the ability to withstand a blow from a hammer on the bulbous end without breaking, while the drops will disintegrate explosively if the tail end is even slightly damaged. When this happens, the large amount of potential energy stored in the drop's crystalline structure is released, causing fractures to propagate through the material at very high speed.

I did research on glass back in college but I never heard anything about this.

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