Charging Stones
Take the stone that you would like to charge hold it in your dominant hand  and press it firmly aginst your minds eye, a.k.a Third eye.
Visualize the need that you want, and visualize it coming true.
  Chant something appropriate for what you need.
  Chant until you feell the stone pulsing with energy, something like a heart beat, this means that your stone is now charged.
Third eye/Minds eye- are the same thing
It is the space in the middle of your forehead just above the eyebrows
Tips: Burning an incense that has to deal with the reason why you are charging that stone will be helpful to you
ex:say you are charging the stone for luck, have a luck incense such as patchouli burning while you are charging your stone.
How to Charge Tools
How to Charge Herbs
How to Charge Candles