Kathy and Ben Stout, stream ecologists, studied the Caddisfly for years. They decided that their cases would make unique jewelry so they started Wildscape Inc.(www.wildscape.com) They collect the larvae, put them in a "predator-free simulated stream environment", and give them gems and minerals to build their cases. After the Caddisflies leave their cases, the Stouts collect them, polyurethane them, and make them into jewelry. I worked for them for years, making jewelry and working fairs. These are 2 pieces I made, the top is seashell and the bottom is emerald.