Polymer Clay is the perfect medium for jewelry.  It is lightweight, colorful, waterproof, and sturdy.  

Earrings

Bracelets

Necklaces

Pins

Pin People

Rings

First created in the 1930's by German dollmaker Fifi Rehbinder, Polymer Clay made its way to the U.S. in the early 1960's.  Although called clay, the medium, when cured, becomes a sturdy vinyl, and hence is perfect for jewelry, figurines, and fine art.