Jonathan Ben-Tovim / greenKarat

These rings aren't just pretty — they're smart, too. The bubbly "encoder rings" by Australia's Jonathan Ben-Tovim are "decorated with tiny blobs and holes that actually represent letters in binary code." Each can store a message up to 64 characters long, which means they could probably beat me at Scrabble.

Bonus link: here's another binary ring from Houston's greenKarat, an eco-conscious company that uses recycled metals.

Even more jewellery:

• Leah Heiss (Australia) - science & tech


• Takto (Spain) - clean gold


• Sarah Jane McCallum (UK) - silver waves