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What is jet jewelry made of? Jet, the black organic gemstone behind Victorian mourning brooches, is fossilized wood: a compact form of lignite that began as trees related to the modern monkey puzzle (Araucaria), which sank into stagnant water roughly 180 million years ago. It isn’t a mineral or a crystal. Oxygen-starved decay and the…

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What is jet jewelry? It is jewellery carved from jet, an organic gemstone made of fossilized wood that polishes to a deep black lustre yet weighs almost nothing in the hand. Most antique jet jewellery found today was cut from Whitby jet, a material that formed over millions of years beneath the Yorkshire coast of…

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