Carnauba wax is known as "queen of waxes" and in its pure state, usually comes in the form of hard yellow-brown flakes. It is obtained from the leaves of the carnauba palm by collecting and drying them, and beating them to loosen the wax.
The melting point of carnauba wax (82 to 86 degrees C) is higher than that of bees wax (62 to 64 degrees C). Because of this you do need to use a higher temperate to get it to melt and emulsify. As it is a harder wax, you also need to use less of it in a recipe, as a substitute for bees wax, to get the same result.