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Isle of Man 2015 - 175th Anniversary of the Penny Black Stamp-Proof Fine 999.9 1/5oz Gold Crown.
This way to test gold at home is not as reliable as some, but it is a good way to know if gold is real or fake. Apply liquid foundation and powder to your forehead. Rub your gold jewelry across the area. If a black streak is left behind, it is more likely than not that the piece is gold.se a dropper to apply a small drop of nitric acid to the scratch. If there is no reaction, then the piece is probably made from real gold. You are most likely dealing with another metal or even a gold-plated item if you see green. Gold-over-sterling will leave a milky substance when nitric acid is applied.