Birch Oil, Adirondack - Believed to be the only authentic birch oil produced on the market today.  Quite a bit more complex than the typical commercial "birch oil" on the market and has a nice light green color to it.  The quality of this oil is quite amazing.  True birch oil is expensive because the bark has to be macerated and soaked in warm water for 10-12 hours minimum before it can be distilled.  The yield is very low and the oil is more difficult technically to collect from the distillation because its more dense than water and so the oil layer sinks to the bottom of the collection apparatus instead of floating on top like most essential oils.