sources to learn about crystal grids

[crystalh3ro]

I know that crystals have metaphysical qualities. I have a few crystals, some I got from friends, and some I bought myself.
whenever I acquire a new crystal, I can feel this shift in my aura.
I'm really interested in learning about crystal grids, but I'm not sure where to begin. Any suggestions on books, videos, or any other source to learn about crystal grids?

 

[brownies_]

my friend gave me the ultimate guide to crystal grids by Judy Hall, it's pretty good, even for a beginner