Earrings are cut and sanded, for smoothness, from the 2 tins in the images.  The blue and white top circle is embossed. 
Ear wires are gunmetal-plated brass, 15mm 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.
Some Tins are Vintage and worn and add a Unique element to the Design.