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Sampling of: Acid Test For Gold
(Report #420)
F R E E ! ! !
How You Can Find the Number of Karats in Gold If you wish to find out if a piece of jewelry is made of gold, touch it with a glass stopper which has been wetted with nitric acid .... If it is pure gold it will remain untouched and unchanged; if not, the solution will become blue from the formation of nitrate of copper .... (False "gold" always contains copper .... |