Raindrop Fiddle Charm

This is the real shape of a raindrop- if you point a high speed camera at a raindrop as it falls, you see this sort of shape, with a divot in the bottom. 
To me, this charm carries all the symbolism of rain (growth, hope, but also sadness), plus the symbol of finding the truth with science. 
It's a great worry stone, and it fills me with strength to think about the amazing things humans can find with science. It makes me proud.