There's no better way to enhance a wood fire than with color and scented cones. Color cones are pine cones that have been treated with chemicals that cause them to produce vivid colors like blue and green when they burn. Scented cones are pine cones that have been treated with oils that allow to them to give off a pleasant aroma that is intensified by burning. Both of these fireplace accessories make great gifts for anyone with a wood burning fireplace.