Original Data · Rand vs Rapaport · A Cutting House Reads The Market
Diamond price trends in South Africa: what the dollar crash and the rand did to the price you pay.
In US dollars, the wholesale price of a one-carat diamond has fallen roughly 40 percent since its 2022 peak. In rand, South African buyers barely felt it for two years, because the weak rand held the local price up. Only now, with the rand firmer, has the full drop arrived.
We trade against that dollar benchmark every day, so here is the real picture, plotted from the published RapNet index and the Reserve Bank exchange rate, and what it means for buying a natural diamond right now.
See today’s live ZAR prices How the pricing mechanism works →
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The same diamond, in dollars and in rands, 2022 to 2026
Both lines below start at 100 in 2022 and track the RapNet Diamond Index for a one-carat stone, the wholesale benchmark every dealer prices from. The dollar line is the global price. The rand line is that same benchmark converted to rand at the Reserve Bank rate. The gap between them is the rand at work.
The numbers behind the lines
Here is the same data as figures. The dollar column is the RapNet 1-carat index; the rate is the Reserve Bank average for the year; the rand column is the two multiplied, the benchmark a South African buyer is working against before a stone’s exact grades and VAT.
| Year | RapNet 1ct (USD) | USD/ZAR | Benchmark in rand | Rand change |
|---|---|---|---|---|
| 2022 | $7,400 | 16.36 | R121 000 | baseline |
| 2023 | $6,300 | 18.45 | R116 000 | -4% |
| 2024 | $5,300 | 18.33 | R97 000 | -16% |
| 2025 | $4,500 | 18.00 | R81 000 | -17% |
| 2026 | $4,400 | 16.45 | R72 000 | -11% |
Figures rounded. RapNet index values are Rapaport’s public 1-carat benchmark (round, roughly D to H), not the proprietary full price list and not a Prodiam quote. Your stone’s price depends on its exact cut, colour, clarity and carat.
What actually happened, year by year
The story the two lines tell is not the one the global headlines told. In dollars, this was a crash. In rand, it was a slow puncture, and the rand chose the timing.
- 2022 to 2023: the dollar fell, the rand hid it. The dollar price dropped about 15 percent as the post-pandemic boom broke and lab-grown stones bit into demand. But the rand weakened from about 16.40 to 18.45 over the same year, so in rand the benchmark slipped only about 4 percent. A South African reading global headlines about a diamond crash saw almost none of it on the shelf.
- 2023 to 2024: the dollar kept falling, the rand stopped helping. Another 16 percent came off the dollar price. The rand held flat near 18.30, so this time the full fall reached SA buyers: the rand benchmark dropped about 16 percent.
- 2025 to 2026: the rand turned, and amplified the fall. The dollar price was nearly flat, down only a couple of percent, but the rand strengthened from about 18 to about 16.50. A firmer rand makes a dollar-priced diamond cheaper, so the rand benchmark fell another 11 percent even though the dollar barely moved.
Add it up and a one-carat benchmark that sat near R121 000 at the wholesale level in 2022 sits nearer R72 000 today, a fall of about 40 percent in rand, most of which only became visible to South African buyers in the last 18 months.
Why a cutting house can tell you this and a shop cannot
This is not analysis we read somewhere. We buy rough at De Beers viewings priced in dollars, we cut and sell against the same Rapaport dollar list, and we settle in rand, so the gap between the two currencies is the number we live inside every week. A retail counter buys finished stock in and marks it up; it has no particular reason to know, or to tell you, that the rand did most of the moving.
The practical upshot for a buyer today is simple and, for once, in your favour: the dollar price has come back to earth from its 2022 high, and the rand has firmed enough to carry that through. That does not mean a diamond is a bargain or an investment; it means the rand maths is keener now than it has been in years. We would rather you understood the mechanism than took our word for it, which is the whole reason this page exists. When you want a real figure, the live search shows fully-landed ZAR prices on actual GIA-certified stones, and how diamonds are priced in South Africa walks the mechanism in full.
Sources and method
The dollar figures are the RapNet Diamond Index (RAPI) for 1-carat diamonds, the wholesale benchmark Rapaport publishes in its regular market reports; the late-2025 reading of 4,437 dollars and the description of prices as roughly 40 percent below their 2022 highs are from those public releases. The exchange rates are South African Reserve Bank average USD/ZAR figures. The rand column is our own calculation, dollar index times exchange rate, rounded. The result is a like-for-like benchmark over time, not a price quote: a real stone is priced on its exact 4Cs, and we quote it firm in writing before any work begins.
Diamond price trends in South Africa: common questions
Have diamond prices gone up or down in South Africa?
Both, depending on when you look and in which currency, and that is the whole point. In US dollars, the global wholesale price of a 1-carat diamond has fallen heavily: the RapNet Diamond Index, Rapaport’s published 1-carat benchmark, dropped from roughly 7,400 dollars at its 2022 peak to about 4,437 dollars by late 2025, a fall of nearly 40 percent, driven by softer demand and the rise of lab-grown stones.
In rand, though, South African buyers did not feel that fall for two years, because the rand was weak, around 18 to the dollar through 2023 and 2024, which kept the rand price up even as the dollar price slid. It is only now, with the rand firmer at about 16.50, that the full drop has reached SA buyers.
So the honest answer is that diamonds are meaningfully cheaper in rand today than they were in 2022, but the timing of that was hidden by the currency.
Why are diamond prices set in dollars and not rands?
Because the diamond trade is global and prices against one international benchmark, the Rapaport price list, which is quoted in US dollars per carat for every colour-and-clarity combination at every size. Every serious dealer in the world, including in South Africa, starts from that same dollar sheet and trades at a discount or premium to it for a stone’s exact make.
A South African price is then just that dollar figure converted into rand at the day’s exchange rate, with 15 percent VAT added. This is why the rand price of an identical, unchanged diamond can move from one month to the next: nothing about the stone changed, the exchange rate did. We set the mechanism out in full in how diamonds are priced in South Africa.
Is now a good time to buy a diamond in South Africa?
On the numbers, the case is stronger now than at any point since 2022, and we would rather show you why than just say so. Two forces set the rand price of a natural diamond: the global dollar price and the rand. From 2022 they pulled in opposite directions, the dollar price fell but the weak rand held the rand price up, so SA buyers saw little benefit.
In 2025 and into 2026 they finally aligned: the dollar price kept easing and the rand strengthened from about 18 back to about 16.50, so both now push the rand figure down together. A benchmark 1-carat that cost roughly R121,000 at the wholesale level in 2022 sits nearer R72,000 today on the same measure.
That is the index, not a quote for a specific stone, but the direction is real and it favours the buyer.
Will the rand make diamond prices rise again?
It can, and that is the honest risk to weigh, because it is the rand, not the diamond, that has done most of the moving. If the rand weakens again, as it has repeatedly over the past decade, the rand price of the same diamond rises even if the global dollar price stays flat or keeps falling.
That is exactly what happened in 2023 and 2024, when a rand near 18 kept local prices up through a falling dollar market. So the favourable window today rests partly on a firmer rand, which is not guaranteed to last.
We do not forecast the currency and would not pretend to, but it is the reason a diamond priced in dollars is, for a South African, partly a view on the rand. Buying while both forces sit in your favour is a defensible call.
Does the lab-grown diamond boom explain the price fall?
It is a large part of it, on the dollar side. The roughly 40 percent fall in the dollar wholesale price of natural diamonds since 2022 tracks the period in which lab-grown stones moved from a niche to a mainstream choice, pulling demand and pricing pressure off the lower and middle of the natural market, alongside a broader post-pandemic demand slowdown.
Lab-grown prices themselves have collapsed far further, down roughly 90 percent since 2016 and still sliding, which is a separate story about an unlimited-supply product. For a natural-diamond buyer the practical reading is that the dollar price of a natural stone has come back to earth from its 2022 high, and the firmer rand has carried that through to the rand price.
We deal in natural stones and set the two side by side honestly in our natural versus lab-grown comparison.
Written and last reviewed by Darren Etkind, director, Prodiam Trading, on 26 June 2026. Figures are the public RapNet index and SARB exchange rates; the rand benchmark is Prodiam’s calculation.