A hallmark is used as an indication of the metal content in precious metal jewellery and is usually stamped into the piece.
A hallmark guarantees the purity of the metal as determined by assaying (testing) the metal by one of several methods.
Some of these assay methods are destructive but highly accurate (to 1 part in 10,000) and used to test random samples from a manufacturer for compliance.
Other methods are completely non-destructive but with a corresponding loss of accuracy (around 2 to 5 parts per 1000) and these would be used during a jewellery valuation to test a piece assumed to be of value.
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Chain Me Up is an online jewellery store that exclusively sells Australian made solid 9ct gold and 925 sterling silver jewellery. Custom made chains in any length with your choice of clasp or padlock.
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