BJM Gold Chain Meaning: Understanding UK Gold Purity

BJM is a hallmark used by the Birmingham Assay Office in the United Kingdom. It indicates that the item has been tested and verified to meet the legal standards for gold purity in the UK. The BJM hallmark is typically found on gold items that are at least 9 carat gold, which means that they contain at least 9 parts of pure gold out of every 24 parts.

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