Weighing gold in Canada: the scale, the gram and the transaction record

A transaction scale is regulated equipment

Measurement Canada states that when a scale is used to weigh gold or other precious metals at the point of purchase, it must be approved and inspected, designed for precious metals and meet the accuracy requirements of the Weights and Measures Act. A device that does not meet the requirements must be marked not legal for trade and cannot be used to buy or sell precious metals by weight.

That is different from using a household scale for private preparation. A seller can use a kitchen or pocket scale to estimate what they may have, but the device and reading should not be treated as the verified transaction weight.

Watch the full weighing sequence

The useful evidence is more than the final number. The display should begin at zero, show the unit, remain visible, and identify whether the reading is gross item weight or the eligible weight used in the calculation. Packaging, stones, watch movements, springs, clasps and other non-gold parts can make those figures different.

Items with different hallmarks or transaction lanes should be recorded separately. Combining 10K, 14K and 18K jewellery into one weight before purity is established makes the price calculation harder to audit.

• Confirm the scale reads grams and begins at zero.
• Record each purity or product group separately.
• Distinguish gross weight from payable or eligible weight.
• Ask for the verified weight, purity and price input on the receipt or offer record.

Precision does not establish gold purity

A precise weight does not prove an item's karat or authenticity. Hallmark review, construction, testing and product-specific authentication remain separate steps. The weight becomes economically meaningful only when it is paired with an appropriate purity result and a time-stamped CAD gold reference.

For recognized bullion, nominal product specifications, dimensions, packaging and authenticity tests should reconcile with the measured result. For jewellery, the operator may need to account for stones and non-gold components before estimating recoverable metal.

From an estimate to a verified weight

When discussing an assessment, ask which scale will be used, how non-metal components will be accounted for and how the final weight will be recorded. Keep the measured weight and verified purity with the offer so the calculation can be checked.

Meridian’s online tools use the weight you enter to estimate metal value. They do not certify that weight. Contact us to discuss an assessment and confirm the process before your visit.