Material: 24K gold vermeil, gold filled
Aoyama CZ Swag Earring
Gold Filled Jewelry consists of 2-3 layers of solid gold (bonded or pressed) with other metals a brass, silver, or other base metal.
There is another type of gold plating that is called Vermeil. Vermeil is an item that is made of sterling silver and plated with a thin layer of gold.
the thickness of gold on the piece should be at least 2.5 microns.