Understanding 10K BA Gold Rings: Purity and Hallmarks

The marking 10K BA on a gold ring indicates:

  1. 10K: Gold purity—10 karat gold contains 10 parts pure gold and 14 parts other metals (copper, silver, zinc). Pure gold is 24K.
  2. BA: Likely stands for Birmingham Assay or British Association. The Birmingham Assay Office (UK) hallmarks precious metals, certifying purity standards. The BA mark confirms the ring meets 10K gold standards per UK regulations.

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