What's the best way to charge crystals

[wotan namah]

I have a crystal collection of a bunch of different kinds. I would like to use the metaphysical properties of some of the stones. I notice some of them even without doing anything I feel an energy. Do I vibrate runes into the ones I want to use or mantras. Program them. I would like to carry one or two on me and maybe use them to work on my chakras how do I do it.

Yes I also have clear quartz which can be made into just about anything energy wise. I know how to empower those. However what about the other crystals. Moldavite is one I am really interested in. I bought a small piece and I feel it's energies are really intense. It's supposed to be able to transform my life for the better how do I program it.