Sterling Silver and Fine Silver earrings are made in glass vitreous Japanese enamel. Lever back ear wires in sterling silver. They are about 1.75" in diameter. They are blue and green colors.
Vitreous enamel, also called porcelain enamel, it's when material made by fusing powdered glass to a substrate by firing. The powder melts in the special kiln at 1500 degree F, flows, and then hardens to a smooth, durable vitreous coating. Don't be fooled with cold enamel (resin), which doesn't require firings in the kiln
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