These earrings are created from a Vintage, Dutch tin that is embossed. The small tin piece inside the round bezel drop is from the same tin. 
Earrings are hand cut and sanded, for smoothness.
Earring wires are antique gold-plated brass, 16mm flat fishhook with open loop, 21 gauge.  Each pair come with silicone clear earring backs. 
Earrings have been treated with a museum grade wax to protect and enhance, called Renaissance.
I can change out the wire to a hypoallergenic Niobium wire if desired. The extra cost is $4.