18ct gold refinery rate today
R 1 620
per gram
Based on the live gold price. 28 Sept 2026, 23:10
What 18ct gold is
18ct means 18 parts out of 24 are pure gold, and the rest is other metals that make it harder and change its colour. It is used for fine jewellery, wedding bands and settings for diamonds.
18ct is often stamped 750. Some older pieces stamped 18ct test lower, which is why we always test in front of you.
What you will actually be offered
No buyer pays the full refinery rate for jewellery, because melting, refining and testing all cost money, and some pieces turn out to be lower than their stamp. A fair offer is below the refinery rate, and an honest buyer will show you how they worked it out.
We test and weigh every piece in front of you and explain our offer line by line. Read our full guide to the gold price per gram to see exactly how we work out an offer.
How to estimate your own gold
Find the stamp (it may read 18ct, 18K or 750). Weigh the piece on a kitchen scale in grams. Multiply the weight by the rate above. That gives you the refinery value, the ceiling of what the gold is worth.
More questions
- Is 18ct gold real gold?
- Yes. 18ct gold contains 75% pure gold mixed with other metals.
- Why does the 18ct price change during the day?
- It follows the international gold price and the rand to dollar exchange rate, which both move constantly.
- Will I get the full 18ct refinery rate if I sell?
- No. Buyers pay below the refinery rate to cover refining costs and the risk that a piece is under carat. Ask any buyer to show you how they got to their number.
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