What Happens When Hallmarking Fails: Rejection, Re-Testing, and Remediation

Not every article submitted to a hallmarking centre passes testing. When an article's measured purity falls below its declared fineness, the hallmarking centre must reject it. Understanding the rejection process — and how to prevent it — is essential for jewellers who want to maintain efficient operations and minimise costs.

Why Articles Fail Hallmarking

The most common reason for rejection is purity shortfall: the gold or silver content is lower than the declared karat or fineness grade. This can occur due to inconsistent alloy mixing during manufacturing, excessive use of solder that dilutes the overall purity, surface contamination from polishing compounds or rhodium plating, or inaccurate in-house testing prior to submission.

Other reasons include articles that are too small or too fragile to mark safely, missing or incorrect documentation, and submission of article types that fall outside the hallmarking centre's scope.

The Rejection Process

When an article fails XRF testing, the hallmarking centre follows a defined procedure:

1. Testing and documentation — The article is tested using calibrated XRF spectrometry. If the result shows purity below the declared grade, the reading is documented.
2. Re-test confirmation — A second test is typically conducted on a different spot on the article to confirm the result and rule out surface-level anomalies.
3. Rejection notification — The jeweller is notified of the failure, including the declared purity, the measured purity, and the shortfall.
4. Return of article — The unhallmarked article is returned to the jeweller. No HUID is assigned, and no hallmark is applied.

Re-Testing After Remediation

Once an article is rejected, the jeweller has several options:

Resubmit at a lower karat grade — If the article's actual purity matches a lower standard (e.g., 18K instead of 22K), the jeweller can resubmit it under the correct declaration. The article will then be tested against the lower standard.

Remelt and recast — The article can be returned to the manufacturer for remelting with additional pure gold to bring the alloy up to the required purity. After recasting, it is resubmitted for testing.

Sell as scrap or old gold — In cases where remediation is not economically viable, the gold can be recycled through the refining process.

Costs of Rejection

Each resubmission incurs fresh hallmarking charges. At BIS-prescribed rates, the testing fee is approximately Rs. 35 per article, but the indirect costs of rejection are far higher: production delays, additional manufacturing costs for remelting, and potential disruption to delivery commitments.

How to Minimise Rejections

Invest in reliable in-house testing — An XRF analyser allows jewellers and manufacturers to verify purity before submission. While the capital cost is significant, it pays for itself in reduced rejections.

Standardise alloy preparation — Use precise weighing and mixing protocols for alloy preparation. Document alloy recipes and ensure consistency across batches.

Account for solder — Solder joints can significantly reduce the overall purity of a piece. Use high-karat solder (cadmium-free, as required by BIS regulations) and minimise the amount used.

Work with an experienced hallmarking centre — An experienced centre like Varsha Bullion Hallmarking Centre can provide guidance on common failure patterns and help jewellers optimise their submission process.

Fire Assay in Disputed Cases

If a jeweller disputes an XRF rejection, fire assay can be requested as the definitive referee method. Fire assay involves taking a small sample and conducting cupellation to determine the exact precious metal content. While destructive to the sample, fire assay provides accuracy to 0.01–0.03% and is legally accepted as the final word on purity.

The Bigger Picture

Hallmarking rejections are not punitive — they are the system working as intended. Every rejection protects a consumer from receiving jewellery that does not meet its declared purity. For jewellers, maintaining low rejection rates is both a quality indicator and a business efficiency metric.