After the recent storm we headed to the beach to see if any pieces of Whitby jet had been washed up. We found a few sea washed pieces and made a short video to show how to test the quality of the jet.
If chalked on a piece of sandstone the best quality Whitby jet should leave a light brown/ginger mark. This is the only jet we ever use in our jewellery. Poor quality Jet will leave a dark brown mark. Pieces of sea coal will leave a black mark.