Many of you have been asking about shaving mica. I don’t know if there is a great way to describe how to do this.
But if you look closely at the large rock, you can see that there are very fine, thin layers. We VERY carefully slide a needle under a layer, and slowly pull it off. It is not easy, but you get good at it after a while, and it becomes very habit forming. Then you get carried away seeing how many times you can slice a layer. But if you do it TOO many times and take it down to only one VERY thin layer, you lose the refracting quality, and it just becomes flat and shiny.
We really wanted it to refract light, so we stopped at two or three layers on each shard.