I have a St. Guadens $20 gold coin, How can I tell if it is real?
1: measure its volume, then its weight and calculate its density
against gold. 9.32 g/cm3 = pure gold.
that is grams per cubic centimeter.
Any high school chem lab can do this. (mass/volume)
2: the acid test. (ask any jewelry store on earth)
coins can be plated/filled/dipped, or coated in gold or fake gold alloys.
or non plated coins can be cut. that is not pure. (alloyed )
a pro measures and weighs the coil
or looks up the coils real mass, and weight from the makers mint.
then checks your coin to see if it weighs the same amount and the size is not wrong.
Oct 31, 2013 |
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