Caroline Gore / Yoko Ueda / Josée Desjardins
But it is a ring! Meant to be worn between the fingers, this boro glass piece is from the "weights:balance" series by Kalamazoo, Michigan's Caroline Gore.
These pieces (above) aren't quite what they seem, either. Yes, they're rings but no, they aren't quartz. Can you guess what they're made of? Designed by Japan's Yoko Ueda, the "gems" are actually...
...cat hairs trapped in acrylic.
Even more jewellery: