Art!
I am a big fan of a guy called Pablo. he post youtube video which are very creative on how he makes jewelry. I am amazed by the art, humans definitely have found the way to create such natural rocks into beautiful and expensive pieces.
Here's the video have a look!
This purely belong to the youtuve channel- https://www.youtube.com/channel/UCprE-A6kxxldJTDvkW1L0jg