Germany WW11 Era 18k Art deco rolled gold aquamarine style Pendant on chain

 Gold Rolled: Definition: a hybrid material, consisting of a thin layer of gold that's mechanically bonded or heat-fused to one or both sides of a base metal (often brass or copper), then rolled out into sheets to create jewelry; the thickness of the gold layer can vary, but is generally at least 5% of the total metal weight (vs. gold-plated, which uses a thinner sheet of gold); patented in England in 1817, it became a prime source for semi-precious and better-quality costume jewelry in the Victorian era; saw a renewed surge of popularity in 1920s and 1930s, especially in utilitarian objects such as watches and fountain pens

I HAVE MEASURED IT IS 7.7GR Total Weight. I am not sure of the stone in the pendant, but the stone and pendant weight is approximate 4gr, The carat would be 21.5, the trick is to know what the stone is......