Metals "mined" by plants feature in a first-of-its-kind ring, made by materials researcher and designer Karoline Healy under her jewellery brand H2ER?.
The metals were obtained using the emerging technology of phytomining, in which special species of plants known as hyperaccumulators suck up metals from the soil through their roots. The technology is so nascent that Healy's is the first known jewellery item, if not the first object, to be made using materials obtained through the process ? even if they are only contained in the decorative sphere set into the ring and not the band itself.
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