Prince Rupert's Drop · Bulletproof Head, Explosive Tail
unseel.com · molten glass frozen in water · a locked-in squeeze you can't hammer, undone by one snip
Fracture 0%
Crack speed ~1.5 km/s
Phase FORM
Compressive skin (squeezed inward)
Tensile core (pulling outward)
Fracture front — races to the head
Powder — the drop shattered
Unseel.com · Prince Rupert's Drop