These necklaces by Eskimeit are made from Ubamegashi coal, a luxury (!) coal in Japan used to fuel grills particularly for cooking eel in high end restaurants. Ubamegashi coal is apparently very hard – comparable to stainless steel – and when cut, the edges appear metal-like. I love the organic shapes and the darkness of the coal. Each necklace has a magnetized clasp that has been embedded into the coal.