3 Kings Charcoal 1 5/8 inch (40mm) Round 10 Piece Pack Self Lighting Used with the burning of incense. This charcoal is most useful when burning natural incenses- frankincense tears lumps of myrrh or other resins. Directions: Place the charcoal in a burner or non-flammable dish. Do not hold it in your hands as it ignites very quickly. Touch the outer edge of the charcoal with a lighted match or taper and add your incense cones powder or resins in the center of the charcoal.