Irish harp brooch made from bog oak set with rock crystal
What is bog oak?
Bog oak is similar in nature to Whitby Jet in that both are the result of fossilization of trees. Whereas Whitby Jet comes from the¬†Araucaria tree around the town of Whitby in the UK, bog oak comes from Ireland and is not a specific species of tree, rather it is a term that designates oak that has been buried in a peat bog. The process for the formation of both bog oak and Whitby Jet takes hundreds to thousands of years to form and is unlike any other material used in jewellery
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