You can turn an everyday fire into a spectacular light show. Color crystals for the fire add brilliant blues and greens to the reds and yellows of burning wood. They come in premeasured wands and tubes as well as 16-ounce shaker cans. From fireplaces to chimeneas to campfires, simply throw the enhancer crystals on the fire for dazzling color that lasts a quarter of an hour on an open fire and up to an hour in a closed system, such as a wood-burning stove.