Irish Bog oak

Bog Oak comes from ancient forests that once covered Ireland. Huge oaks have been buried in peat bogs and preserved from decay by the acidic and anaerobic bog conditions, sometimes for hundreds or even thousands of years. The wood is usually stained black by tannin dissolved in the acidic water. Bog-wood represents the early stages in the fossilization of wood, with further stages ultimately forming lignite and coal over a period of many millions of years.
Known as King of the forest for its strength and longevity, the Oak was sacred to the ancient Celts and is considered one of the three primary magical woods.