The hearth sprite is a familiar and well-loved figure, present in many homes. Drawn in the flickering of a fire, the warmth of a stove or just a trace of coal dust; the sprite is easy to attract.
Having done so, many people follow the tradition of bottling a sprite, and keeping it on the mantle for good luck and prosperity.
As long as you feed it with a pinch of coal dust every day, the sprite seems content to live in the jar. (Should its glow start to dim, it should be released immediately.)