I came across this jewellery designer's work while researching around bio-plastic...

Courtney Starrett's beautiful and organic shapes look like wearable creatures from the sea. Spiky, yet you know from the material it would be soft and pliable to the touch. Lovely use of colours too.

http://www.courtneystarrett.com/gallery3.html

http://www.dailyartmuse.com/2009/11/13/courtney-starrett-rubbermade/