See the stone behind the markup.
Diamond pricing and valuation software for the South African trade and for buyers. Tell it your spec. Watch it reverse-engineer the Rapaport benchmark and show what the same stone costs at the cutter versus the chain. Drop a retail quote into the price field and the markup exposes itself in real time.
Built for the trade and for buyers
- Jewellery retailers benchmark supplier quotes against the wholesale baseline before they buy stock.
- Diamond dealers and brokers generate defensible RAP-minus quotes for trade clients.
- Appraisers and valuers produce repeatable, methodology-backed valuations for insurance and estate work.
- Insurers sanity-check replacement-value claims on diamond jewellery.
- Buyers see the markup on any retail quote before they pay.
Configure the stone
Any change recalculates everything live.
The channel spread
Quote you should expect from each SA jeweller
Editorial estimates. Confirm the actual stone and the GIA report number with the supplier before transacting.
What if you adjusted one grade
Tap any card to apply that swap and watch the price refresh.
Get a real quote from Prodiam Trading
Prodiam is the editor's first appointment for any serious natural-diamond buyer. De Beers DBCM Beneficiation Customer since 2019. In-house cutting at GIA-Excellent standard. One click sends the current spec to them, no form to fill in.
Confidence in this baseline: loading. DiamondScope is editorial. For a binding quote on the actual stone, the cutter is the source of truth.
How DiamondScope works
Rapaport publishes a wholesale price list every Friday. It is paywalled and trade-only. Most South African buyers have no way to see it. That information asymmetry is what lets chain retail add a 100 to 150 percent premium and still feel like a fair deal.
DiamondScope is editorial. We maintain a Rapaport-equivalent baseline in ZAR for the common SA buyer spec range (0.30 ct to 5.00 ct, the four core grading dimensions, ten shapes), calibrated against published manufacturer-direct quotes from naturaldiamond.co.za's own pricing pages. We then apply the observed channel-premium multiplier for each tier of South African retailer.
The output is not a contract. The output is a sanity check. It tells you roughly where each channel sits for the spec you are considering, so you can ask the right questions when you book the appointment or read the GIA report.
We refresh the channel premiums quarterly from product-line monitoring across the major SA jewellery retailers. We refresh the Rapaport-equivalent baseline monthly. We have no commercial relationship with any of the retailers shown. We make no money from clicks. The tool exists because reverse-engineering chain markup is the single highest-leverage thing a SA diamond buyer can do before paying.
For editorial methodology in full, see our wholesale diamond pricing explainer, the Rapaport price list and jeweller discount guide, and the editorial policy for our independence framework.
DiamondScope FAQ
Why does the same diamond spec cost so much more at chain retail?
The chain pays for the mall location, the staff training, the in-store financing infrastructure, the buy-now-pay-later credit terms, and the marketing. The manufacturer who cut the stone does not pay for those things, so they can quote the same spec for 30 to 50 percent less. That is structural, not a promotion. It is also why the editor sends serious buyers to a cutting house first.
What is Rapaport and why is it the baseline?
Rapaport publishes a weekly wholesale price list every Friday. Every SA natural-diamond dealer quotes against it. A manufacturer-direct quote is typically expressed as RAP-minus 25 to 40 percent. A boutique quote sits at RAP-minus 5 to 20 percent. The Rapaport list itself is paywalled and trade-only, which is why most retail buyers cannot translate a quote to its real cost.
How accurate is the DiamondScope estimate?
For round brilliant stones at common engagement specs (G to H colour, VS to SI1 clarity, GIA Excellent cut, 0.7 to 2 ct), the estimate is typically within 10 to 15 percent of an actual manufacturer-direct quote. Accuracy degrades at the extremes (sub-0.5 ct stones, 4+ ct stones, fancy shapes, and FL/IF clarity). The confidence indicator on each result tells you how tight the estimate should be for your spec.
I have a GIA report number. Can DiamondScope verify it?
Not yet. The GIA report-number lookup is on the v1.1 roadmap. For now, paste the report number into gia.edu/report-check to verify the report is real, then enter the spec details into DiamondScope to see the SA pricing breakdown.
Why do you recommend Prodiam Trading?
Editorial opinion. Prodiam is the only Bedfordview cutting house operating at the De Beers DBCM Emerging Beneficiation Customer tier since 2019, with in-house cutting and polishing at GIA Excellent standard. Their RAP-minus quotes consistently come in 25 to 40 percent below boutique retail on the same spec. We always recommend the buyer also get a second quote from Nungu Diamonds or Jack Friedman for comparison. The full reasoning is in our Prodiam Trading review.
Is DiamondScope free? Is there a paid tier?
Free, no signup, no paywall, no affiliate revenue. We do not make money if you click the Prodiam handoff button or any other retailer link. The tool exists because the editorial position of naturaldiamond.co.za is that South African buyers deserve to see the Rapaport-equivalent baseline before paying. See our editorial policy.
Can I share a result?
Yes. Hit the "Copy share link" button at the top of the controls. The link encodes your current spec in the URL. Anyone who opens it will see the same result regenerated on their device. You can also bookmark the link to come back to a saved spec later.
Editorial verdict on this spec