Is that still the same thing afterward? It survives a few timid taps with a hammer, which isn't impressive (regular glass beads can do this). It then also sur

Is that still the same thing afterward? It survives a few timid taps with a hammer, which isn't impressive (regular glass beads can do this). It then also survives having the remains of the tail cut off with snips, which is a thing that Prince Rupert drops do not survive -- as a rule. If I had to guess, then I'd guess that heating it and cooling it relatively slowly (as shown in the video) has somewhat annealed it, and thus converted a Prince Rupert drop into a regular slug of glass.