This ritual was originally written to help a girl get her parents to talk to her again, after she told them she was a Wiccan. I've editted it, so that it can be used and/or rewritten for most cases and people.

Preparation:
Anoint the white and pink candles with peace oil. Place some on your wrists, or at the base of your throat.
Can also anoint the rose quartz with it if you wish. Place a little in an oil burner, and light the oil burner's candle a few minutes before you start the ritual.

The Ritual:
Cast the circle in your usual way. Light the incense (if you are using it).
Sit before the altar and meditate for a few minutes. Concentrate on getting rid of all negative feelings towards the person/s.
When you feel calm inside, and your mind is clear, light the white candle and say:

Now light the pink candle:

Light the black candle:

Now hold the rose quartz in your nonwriting hand, and begin to write a letter to the people.
Explain your feelings, what you think about the problem.
If you caused the problem initally (even if you didn't mean to), you need to write a heart-felt apology. Don't lay any blame on anyone.
Write whatever your heart tells you to write - remember that your aim is to bring peace and communication back between yourself and the people involved.

Now, sprinkle a few drops of the Peace Oil on the letter and anything that is going to be included in the envelope.
Seal the envelope, smear a few drops of oil on the join, and hold it against your heart saying:

Now give it to the person as soon as possible, but leave them alone to read it.
If you feel that the problem may still remain after they read the letter, then carve pink candles with your names, and light them for several minutes each night, concentrating on bringing back peace and harmony.