I found that myrrh alone burns with an acrid bitter odor but is most pleasant combined with the sweeter resin of frankincense.
As the ancient Egyptians and Hebrews knew, the proportion should be approximately 6 frankincense to 1 or myrrh. Butn over low heat. Put an ember from the fire on a hearth shovel and shake the incense sparingly over it, then let it burn on the hearth. Or place ember and incense in a thin pan on the stove over low heat, don't allow it to flame.