If you’ve ever looked closely at a Gold ring or chain, you may have noticed a tiny number stamped somewhere on the piece. 375 Gold is one you’re likely to come across, but what does that number actually tell you about the Jewellery you own?
Understanding the value of Gold starts with knowing how much pure Gold an item contains. Weight matters, but purity, current market prices and professional testing all contribute to an accurate assessment.
Here’s what to know before having your Gold Jewellery valued.
Beyond the Hallmark
What does 375 mean on Gold?
Gold Jewellery is commonly marked according to its fineness, which expresses its Gold content in parts per thousand. Under South African standards, 375 Gold corresponds to 9-carat Gold and contains 37.5% pure Gold.
Other marks you may recognise include:
- 585: 14-carat Gold, containing 58.5% Gold
- 750: 18-carat Gold, containing 75% Gold
- 916: 22-carat Gold, containing 91.6% Gold
These markings provide a useful starting point. They shouldn’t, however, be treated as the final word on an item’s purity. Vintage Jewellery may have worn or unclear markings, imported pieces can follow different marking conventions, and plated items can contain a different metal beneath the surface.
For that reason, a 375 Gold stamp is useful information, but professional testing can provide a clearer assessment of the metal itself.
The Formula Behind Your Gold’s Value
Once purity is established, the calculation becomes easier to understand.
A simplified way of estimating the raw Gold content value is:
Weight in grams × Gold purity × Gold price per gram = theoretical Gold content value
Imagine a 10-gram 375 Gold piece. At 37.5% purity, it contains approximately 3.75 grams of pure Gold.
A 6-gram piece of 750 Gold, despite weighing considerably less, contains approximately 4.5 grams of pure Gold.
This is why weight alone can be misleading. The amount of pure Gold within the Jewellery is what matters when calculating its underlying metal content.
The Gold price also changes constantly and, in South Africa, its rand value reflects both international Gold pricing and the USD/ZAR exchange rate.
The calculation above represents theoretical metal content value. An actual valuation or purchase price can differ according to the buyer’s pricing methodology and other applicable factors.
How Is Gold Tested Today?
For generations, Gold has been assessed using methods including touchstone and acid testing. These methods are still used in the Jewellery industry, although they have limitations and require careful technique.
Modern X-ray fluorescence, commonly known as XRF, provides another method. XRF can analyse the elemental composition of Precious Metals quickly without damaging the item, making it particularly useful when assessing Jewellery.
No single test should be treated as infallible. XRF primarily analyses material near the surface, which means plating or unusual construction can sometimes require additional investigation. Professional assessment combines suitable testing methods with the knowledge needed to interpret the results correctly.
Does Broken Jewellery Lose Its Gold Value?
A broken clasp or missing stone may affect whether you still want to wear a piece, but physical damage doesn’t change the purity of the Gold alloy that remains.
If a 375 Gold chain breaks, for example, the Gold contained within that chain is still 37.5% pure, assuming the original purity is correctly identified. Its underlying metal value continues to depend on its remaining weight, purity and the prevailing Gold price.
The same principle applies to 750 Gold and other Gold purities.
Know What Your Gold Is Worth
A hallmark can tell you something about your Jewellery. A professional assessment can tell you considerably more.
At Mr K, our experienced team carefully evaluates pre-owned Gold Jewellery in a professional and discreet environment, helping you understand what you own and what it could be worth based on its Precious Metal content and current market conditions.
Have 375 Gold or other Gold Jewellery you’d like assessed? Visit your nearest Mr K store for a complimentary, no-obligation evaluation.
