Programming your crystals..
In metaphysical terms, programming a crystal or other stone is storing an energy pattern in a crystal. The energy pattern programmed into the crystal can be any intention, thought, color, emotion, sound, use, or any other vibration. These vibrations can be accessed to bring those energies into use.
First, you need to formulate your intention. It is important that it is well thought out and properly focused, write it down on a piece of paper. Vague or imprecise wording may confuse a stone's energies, but specific and meticulous wording will precisely direct its energy towards your intention.
Sit quietly, hold your crystal and clear your mind of unrelated thoughts. Start to focus on your intention. You may state your intention out loud, or visualise the words of your intention - whatever you feel more comfortable doing. Repeat your intention several times until you feel the vibrations have been absorbed fully into your stone. When you intuitively feel that the process is complete, it is.