Does anyone know anything about the process of healing through crystals and/or gemstones?

I am intensely drawn to colors in a very emotional way, and was reading a bit about this in a remedy book I had found the other day (it was talking about this in reference to crystals).

Does anyone have any good resources on this?

Any experience or knowlege about this?

I was reading a bit and beginning to understand the properties of certain crystals and what they are to be used for, but no one said anything about what to do when you have the crystal.

Thanks.