Citrine gives warmth, energy and courage. It stimulates your self-confidence. It is a good stone to overcome fears, phobias and depressions. It also works great if you have performance anxiety. It improves your creativity and removes creative blockages. It helps you find the strength to make hard choices and it is a good stone for manifestations.
Citrine is often recreated by heating amethyst. Generally, natural citrine is browner in color than heated amethyst. The meaning of recreated citrine is the same as natural citrine, but the effects of natural citrine are much stronger.
Citrine can discolor when left in bright sunlight, but it can be cleansed and charged in every other way. Here I explain more about cleansing and here about charging crystals. :)