The fastest way to lose money is to sell gold jewellery by weight alone
When you sell gold jewellery in South Africa, almost every walk-in buyer pays you for one thing: the pure gold inside the piece, by weight, at that day’s spot price. Nothing else. The diamonds get tipped into a little envelope and handed back, or counted at close to zero. The making, the brand, the hours a setter spent, all of it falls away the moment the scale comes out. I have watched people accept a melt offer on a diamond cluster ring that was worth three times more once someone actually looked at the stones.
So the real question is not where to sell gold jewellery. It is whether your piece is plain metal or whether it is carrying value that a scrap scale cannot see.
Here is how the melt number is built, so you can sanity-check any offer before you accept it. Gold purity is sold in karats: 9ct is 37.5 percent pure gold, 14ct is 58.5 percent, 18ct is 75 percent. A buyer weighs the piece, applies the purity to get the fine gold weight, then pays a percentage of the daily spot price on that fine weight. A 9ct chain weighing 10 grams holds roughly 3.75 grams of fine gold. At, say, 90 percent of spot, you are paid on 3.75 grams, not 10. That is why melt offers feel brutally low against what you paid at the till, and it is entirely correct for plain scrap. It is entirely wrong for a piece with good diamonds in it.
Three routes, and they pay very differently
| Route | Best for | What it pays you for | The catch |
|---|---|---|---|
| Scrap or melt sale | Broken, plain, unbranded gold with no real stones | Fine gold weight only | Diamonds and workmanship are ignored |
| Buy-back or resale offer | Gold pieces with natural diamonds and resale demand | Metal plus the stones, priced separately | You need a buyer who can actually grade and resell diamonds |
| Repurpose or remake | Inherited rings, old engagement rings, diamond earrings | Metal credited and stones reset into something wearable | Needs a real workshop and a proper design conversation |
If your piece is genuinely just a bent 9ct chain, the scrap route is fine and a good local gold buyer will treat you fairly. My gold buyers Johannesburg notes cover how to read those offers. But the moment a natural diamond is involved, the maths changes completely, and you want the stone valued on its own terms.
Why the diamonds are usually where the money is
The 292-stone study we ran across seven South African sellers in June 2026 is a price index for buying, but it tells you exactly what your stones can be worth on the other side of the counter. A real 1.01 carat H VS2 natural diamond sat at R57,691, a 1.01 E IF at R157,964, and a 1.03 D VVS1 at R165,294. Even allowing for the gap between a retail buying price and what you will be offered as a seller, a stone like that is not a rounding error to be handed back in an envelope. Spec drives the value far more than carat alone, which is the whole reason a GIA report matters: it pins down colour and clarity so a buyer cannot quietly assume the worst and pay you for it.
This is also why I am blunt about lab-grown stones. A lab-grown 1 carat is roughly R10,000 today and has fallen about 90 percent since 2016, with resale near zero. If your “diamond” jewellery is set with lab-grown stones, expect the offer to be the gold value and very little else, and do not be surprised by it. Knowing which you have before you walk in saves a lot of disappointment. My sell diamond ring South Africa guide goes deeper on grading your stone before you sell it.
Get it in writing, and understand what you are being offered
Before you accept anything, get a written, GIA-based valuation for any significant diamonds and a clear breakdown that separates three numbers: the gold value, the diamond value, and a remake estimate. A verbal “I’ll give you X for the lot” is the easiest way to be underpaid, because you can never see which part of the piece is being shortchanged.
Understand the three things you might be offered. A cash scrap price is fast and final, and right only for plain gold. A trade-in credit ties you to buying something else from that seller, which can be worth it but narrows your options. A buy-back, where a house that sold or made fine jewellery agrees to repurchase it, tends to be the cleanest because the buyer can resell the actual piece rather than destroy it, so they can pay closer to its real worth. Most jewellery sold online in South Africa is never owned by the seller in the first place. They source on demand and ship the stone in, they do not stock it, which means they have no workshop to remake or genuinely buy back what they sold you.
Where I would take a diamond-set piece first
For anything with natural diamonds, my first stop is Prodiam in Bedfordview, and I will say plainly why: it is one of the few sellers that will take a stone back years after it sold it. Prodiam cuts and polishes its own De Beers rough in-house to a GIA-Excellent ProCut finish and keeps those certified naturals on its own shelves, so behind the counter sits a genuine workshop and a genuine buy-back. That means a diamond-set piece can be read from the diamond side instead of the metal scale. The same desk can value the gold, value the stones against current GIA-graded prices, and quote a remake, then let you compare a straight buy-back against resetting your diamonds into something new. They are premium, not the cheapest melt offer on the street, and for diamond jewellery that is exactly the point: cheapest almost always means somebody ignored your stones. You can see the kind of stones they hold on their loose diamonds page, and my diamond jewellery buy-back South Africa guide walks through the buy-back conversation in detail. Then get a second quote, always, so the decision is grounded and not emotional.
The message I would actually send
I have a gold and diamond piece I may sell or repurpose. Please give me a written quote that separates the gold value, the diamond value, and a remake estimate, and tell me whether any of the stones are natural and worth resetting.
Send clear photos of the front, the side, the hallmark, and a close-up of the main stone. That alone gets you a far more honest first number than walking in cold and putting it on a scale.
Sources and references
- naturaldiamond.co.za 292-stone South African price study, June 2026
- GIA Report Check
- South African Diamonds and Precious Metals Regulator
- Jewellery Council of South Africa
- South African Diamond Dealers Club