Silverplate and goldplate means a having a thin layer of that form of the jewelry.

HGE indicates Heavy Gold Electroplate. Usually gold is not set into goldplate but solid gold or silver.

No. Gold and silver are elements- the most basic of all materials. No chemical can create gold. That would be alchemy, which does not exist.

yes almost any metal can be used in gold plating,it must be a metal that is strong enough,and can withold certain hot temperatures,obviously namely precious metals.

The cast of The Auction Sale of Run-Down Ranch - 1915 includes: Pat Chrisman as Bill Herrick Victoria Forde as Vicky Herrick Tom Mix as Tom Joe Simkins as Isaac Goldplate