The earrings are made from laminated veneers of maple, walnut and paduk. Vector based illustrations of feathers that I found online were modified and then sent to a laser cutter. The laser cutter then cuts the earring out of the wood veneer sheet. Mount the wood to some earring hooks and Bob's your uncle.
The earrings are lightweight for their size because the veneer is so thin, of course, they are not quite as light as feathers.
Step 1: Acquire Wood Veneer
There are many sources of veneer online and at other local plywood and lumber retailers. The main thing to remember is to buy thin, paper-backed veneers. Try to stay away from a phenolic backed veneer since it will show more of black line on it's edge.