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Glass dropper bottle for 22ct gold testing acid. Laval Europe, the wholesale jewellery making tools specialist brings you a wide range of testing products, view them all on the website.
Rub the jewel to be tested on the touchstone, place a drop of acid on part of the mark left by the jewel.
If the mark disappears, the metal is not 22ct Gold. If the mark remains, the metal is at least 22ct Gold or above.
14 ml
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