OK last ones then I'll leave you alone, I promise 
https://blossom.primal.net/f7780dd65d5268b0feca692761a8499700513a1fa921b2f055d1d1273c8b79c6.mp4
Food for thought.. He gets into cymatics at minute 7 or so..
https://www.youtube.com/watch?v=FhoOA3pASy4
There's another really wild video I found but can't figure out how to share it on the new amethyst.
Also a photo of stained glass from various cathedrals around the world and their resonant frequencies that I can't find.
Fascinating stuff, will update if I find a way to share either of those
Discussion
Don’t worry ! I love that subject and thanks to you , now I have a name to put on the subject I was already interested with ! Cheers buddy