Anyone ever hear of this "silver" test?

This is from an ebay auction for a fake coin. The seller states "the coin dealer demonstrated the “silver” test by using a type of liquid that illuminates silver when applied. Only specks of the coin illuminated, thus proving there is silver in the coin,...."
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Total Copper Nutcase - African, British Ships, Channel Islands!!!
'Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup'
NEVER LET HIPPO MOUTH OVERLOAD HUMMINGBIRD BUTT!!!
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