Gold Testing Acids
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Product details
Gold testing acid 14 Carat
Features:
9; 14 & 18 carat.
Testing Gold
Scratch the object with a file and apply a drop of Nitric Acid. If the object turns a bright green it is gold plated or gold filled on base metal. If the object turns a pinkish cream colour it is plated or gold filled on silver. 10 karat gold will turn dark brown. 12 karat gold will turn light brown. 14 karat or higher will have little or no reaction.
A test stone can be used to test a streak of metal laid down from the jewellery, or a small groove can be filed on an inconspicuous place of the jewellery and tested.
Arkansas stones is the best to use when testing for gold
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