Do RapNet or IDEX sell stones directly?

No. Both are search-and-quote marketplaces. You search the inventory, contact the listing dealer, negotiate price, and transact directly with that dealer. The marketplace charges you a subscription; the dealer pays a listing fee and a commission. Disputes are between you and the dealer, with the marketplace acting as mediator if needed. This is the core thing buyers miss: the platform is a directory, not the seller. The dealer behind the listing almost never holds the stone you are looking at either. They source it on demand from a much larger feed and ship it in, which is exactly why you pay before you ever see it.

What is the cheapest way to access RapNet or IDEX?

RapNet entry tiers run roughly 50 to 150 US dollars a month. Watch two different products both badged Plus: the RapNet Plus price-list add-on is only about 350 US dollars a year and simply adds the Rapaport price list, whereas RapNet Premium Plus is a full search tier at roughly 300 to 500 US dollars a month. IDEX entry tiers are similar and usually a touch cheaper, and free trials of one to two weeks are common. None of this is a meaningful cost for a working jeweller, so choose on inventory fit and dealer quality, not on the subscription line.

Are the prices on RapNet or IDEX final, or negotiable?

Listed prices are the dealer's published asking price, and negotiation is normal and expected. Most experienced buyers ask for 2 to 5 percent off the listed RAP-minus quote, more on parcels or repeat business with the same dealer. Remember that the headline RAP-minus figure is a wholesale number in US dollars. By the time a South African buyer adds freight, insurance, SARS clearance and VAT, the landed cost can move a long way from the screen.

Should I trust GIA-cert-only listings on these marketplaces?

Yes, GIA is the standard. You may still see stones flagged AGS Ideal: AGS Laboratories closed at the end of 2022 and GIA absorbed its light-performance science, so the AGS Ideal report now exists only as an optional digital supplement to a GIA report, not a rival lab grade or a separate premium. Judge cut on GIA's own cut, polish and symmetry, and verify every report number yourself at gia.edu/report-check before you pay.

What about Polygon, Diamond Wholesale Exchange, and other smaller marketplaces?

Polygon and similar smaller marketplaces serve niche audiences and do not add meaningful value over RapNet plus IDEX for general jeweller use. Specialty marketplaces such as GIA Alumni Trade can be useful when you want credential-verified dealers only. None of them solve the retail buyer's real problem, which is not that the stone is being sourced, it is that nobody you can reach has examined it, you cannot see it before you pay, and if it is wrong the remedy sits on the far side of a border.

Is buying off these marketplaces cheaper than buying in South Africa?

Not reliably, once you land the stone. A marketplace sticker is a wholesale dollar number before freight, insurance, SARS clearance and 15 percent VAT, and those layers land unevenly per shipment. Two reference points are more useful than any marketplace screen. Worked up from the published list, Rapaport's round list of 20 March 2026 at G colour and VS1 clarity, less the 10 to 30 percent the trade sells at, converted at R16.50 and with VAT added, a loose one carat lands at roughly R72,000 to R92,000. My July 2026 pricing of 73 one carat listings across 18 sellers, 17 of them South African, found finished one carat rings at premium showrooms running R105,000 to R428,000, a band that includes the setting and rests on three listings of three different specifications. Where a stone is finally sold moves the number far more than which marketplace you searched. The offshore route also removes the two protections worth the most, which are a person on this side who has examined the stone and a chance to inspect it yourself before paying. What nobody can tell you in advance is your landed cost on a specific stone, because clearance and freight vary by shipment.

RapNet vs IDEX Online Jewelers

RapNet vs IDEX online jewelers: bottom line up front

Short answer: RapNet if you are in the trade and want breadth. If you are buying one diamond for yourself, neither. Buy at a manufacturer, cutting house or dealer here.

In the trade. RapNet, for breadth: roughly 1.5 million-plus stones and 12,000-plus dealers, which beats the higher subscription for anyone buying three or more stones a month. IDEX Online is the sensible alternative if Israeli supply is the focus or the subscription line genuinely matters.
Cheaper, for a private buyer. Neither platform sets your price. A retail counter buys at trade level and then applies keystone, roughly doubling it, about three times over at a branded showroom, so the rung you buy on moves your number far more than the search box you subscribed to.
Better. 52 percent of trade-access stock reached D to G colour with VS2 clarity or better, against 9 percent of retail-held South African stock, and buying on this side means a person here has examined the stone and can show it to you before you pay.
They do the rest too. Setting and bespoke commissions, resizing, re-tipping, insurance valuations and buy-back are bench work, and most dealers and manufacturers either run a bench or work with one. A marketplace subscription buys a search box and nothing else.

Go to a showroom instead if you need the ring today, want to try finished rings on a hand first, or want the brand and the box. An offshore listing serves none of those, since it is slower again and you still cannot see the stone.

Here is the part every comparison glosses over: neither marketplace sells diamonds. They are search layers over other people’s stock, and the dealer you find on one is usually sourcing to order as well. That is not a flaw, it is what trade access is for, and it is precisely how a good dealer meets an awkward specification. The flaw is what happens on the retail end of the same chain, where the stone can travel from a listing to a customer without anyone qualified stopping to look at it. That is fine for spec-specific hunting by a jeweller who will vet the stone on arrival. It is the wrong tool for a private buyer here, who can instead deal with a cutter, manufacturer or dealer on this side, see the stone before paying, and skip the offshore freight, insurance and clearance entirely.

A listing is not an inspection: what you are actually buying

Most people who land on a RapNet vs IDEX online jewelers comparison are trying to pick a sourcing platform. The more useful question is what the platform actually is. Both are search-and-quote directories. You search, you contact the listing dealer, you negotiate, you pay the dealer direct. What stays invisible is that the dealer behind the listing is often quoting stock held somewhere else and pulling it in on demand. Taken alone that is unremarkable and it is how the trade has always worked. What matters is who takes responsibility for the stone in the middle. A jeweller who orders it in, checks it against the report on arrival and sends back anything that disappoints has added the missing step. A seller who simply forwards the parcel has not, and the same pattern runs through most “South African online dealers” selling to the public.

I have watched this dynamic up close in the local trade. In June 2026 we listed 230 GIA-certified natural diamonds across six South African sellers and sorted them by where the stone was physically held rather than by who was selling it. Of the stones reachable through trade access, 52 percent were D to G colour with VS2 clarity or better. Of the stock sitting on a South African retail shelf, 9 percent were. Trade access finds better specification, and that is not in dispute on this page. It is the whole reason the sourcing model exists, and the reason a good dealer can fill a brief no display case holds.

So the catch is not the sourcing. The catch is that a stone can travel from a catalogue listing to a customer’s hand without one trained eye stopping it, and the customer pays before it is in front of them. That is a different question from specification, and no percentage on a spreadsheet answers it. A jeweller who orders the stone in, checks it against the report on arrival and returns anything that disappoints has closed that gap. A seller who forwards the parcel unopened has not, and there is nothing on a listing that tells you which one you are dealing with. You can read the full method in the South African diamond price index.

Side-by-side comparison

Dimension	RapNet	IDEX Online
Inventory size	~1.5M+ stones	~1M+ stones
Dealer count	12K+ globally	7K+ globally
Subscription tier (entry)	RapNet Premium ~$50 to $150/month	IDEX Online entry ~$45 to $95/month
Subscription tier (full)	RapNet Premium Plus ~$300 to $500/month	IDEX Pro ~$200 to $350/month
Search precision	Spec-detailed (cut, polish, symmetry, fluor, depth, table %, and more)	Similar precision, slightly less granular UI
Dealer vetting	Member-good-standing list, complaints process	Member directory, less rigorous public good-standing tracking
Pricing convention	RAP-minus standard across listings	RAP-minus standard with some IDEX-list cross-references
Geo coverage	Worldwide, strongest in US, Israel, India, Belgium	Strong Israeli and European coverage, weaker North America
Special-cut inventory (fancies, marquise, asscher)	Largest selection	Comparable but smaller
Lab-grown inventory	Growing, separate lab-grown filter. Not recommended by this site for serious jewellery	Growing, integrated with naturals filter. Keep separate from natural-diamond sourcing
API access	Available at higher tiers	Available
Mobile app	Yes	Yes

When RapNet wins

You are searching across five or more suppliers per month: the inventory breadth covers more dealer relationships than IDEX
You need very specific specs (for example 1.27 ct, F colour, VVS2 clarity, cushion cut, no fluorescence): the precision filter and inventory depth find these reliably
You want fancy shapes: RapNet’s fancy-cut inventory is meaningfully deeper
You want the most-trusted dealer-vetting: the complaints process and good-standing tracking are more rigorous

When IDEX wins

You are focused on Israeli supply: the Israeli dealer concentration is stronger
Subscription cost is a constraint: roughly 30 to 40 percent cheaper at comparable tiers
You are already RapNet-saturated and want a complementary alternative
You want a slightly cleaner UI (subjective, but IDEX’s interface is often described as easier for newcomers)

When neither wins, and a direct relationship is better

For several jeweller use-cases, marketplaces add cost and risk without adding value:

Volume buyer with 20-plus stones a month. Direct supplier relationships unlock 2 to 4 percent better pricing than marketplace conventions
Bespoke or custom-cut buyer. Manufacturer relationships beat marketplace search for custom work. Most manufacturers and dealers either run a bench or work with one, so they take the commission as well as supplying the stone, and the mount is drawn around the stone that was chosen rather than the stone being fitted to a mount that already exists. A search box does not do that part at all
Stocking jeweller buying parcels of melee (small calibrated stones). Buy parcels direct from cutting houses, since marketplaces are over-engineered for melee
One-product specialty jeweller (for example engagement-ring-only, no fancies). A single Tier-1 manufacturer relationship beats marketplace search for predictable inventory
South African retail buyer wanting GIA-Excellent inventory you can actually inspect. This is the big one for our readers, and it is worth spelling out below

The South African buyer’s real comparison

For a buyer based here, the RapNet vs IDEX online jewelers question is the wrong fight. The honest comparison is “a stone nobody has examined on my behalf” against “a stone a person chose, checked and will answer for, and showed me before I paid”. Sourcing sits on both sides of that comparison, which is exactly the point. On either marketplace you are buying offshore and paying first, then layering freight, insurance, SARS clearance and VAT on top of a dollar sticker. The cheaper-looking option frequently lands dearer, and you still have not held the stone.

Finding a seller on this side is a different search problem from finding a listing on a marketplace, and the obvious search terms are the wrong ones. Almost nobody here searches for a diamond wholesaler or a diamond dealer, and the handful of results those words return are not the sellers you want. Query the price the way a buyer actually thinks about it: 1 carat diamond price, or diamond price per carat South Africa. A seller who publishes a rand figure per carat is doing in the open what a marketplace listing does behind a subscription, and those are the ones worth phoning first.

Vet whoever you shortlist exactly as you would vet an unfamiliar listing dealer inside either marketplace, on what they will commit to rather than on how they present. The diamond buying checklist is that process in order, and the two questions that matter most on this side are the two a marketplace screen can never answer: who has physically examined this stone, and when do I get to. After those, the report number in advance so you run the verification yourself instead of accepting a screenshot, the stone and the setting as separate figures, the VAT basis stated rather than assumed, and return terms written down rather than described. Same due diligence, applied where the remedy is actually reachable if something goes wrong.

Realistic monthly cost-vs-benefit

For a working jeweller buying about five stones a month at roughly 5,000 US dollars each, a 25,000 US dollar monthly inventory turn:

Option	Monthly cost	Effective price advantage
RapNet Premium Plus + RapNet Plus list	$400/month + $30 list	Access to 1.5M stones, competitive quotes from 5 to 15 suppliers per stone search
IDEX Pro	$300/month	Access to 1M+ stones, competitive quotes from 5 to 12 suppliers
Direct relationships with local cutting house + 2 Israeli + 1 US distributor	$0 marketplace cost	Tight relationships, 2 to 4 percent better pricing on repeat business, you inspect before paying, slower discovery for unusual specs
For a typical jeweller, starting with direct relationships and using a RapNet entry tier as a price-discovery tool is the most cost-efficient mix. IDEX can substitute if cost is the constraint or Israeli supply is the focus. For a South African buyer specifically, a stock-holding local cutter should anchor the mix, with the marketplaces used only to hunt unusual specs.

A note on real prices, so the dollar stickers do not fool you

RAP-minus quotes are wholesale dollars and they hide the landed reality, so sanity-check every marketplace screen against two numbers rather than against your own optimism. The first is the list itself: Rapaport’s round list of 20 March 2026 prices G colour, VS1 clarity between 1.00 and 1.49 carats at $5,400 per carat, and at the 10 to 30 percent off that the trade actually works in, converted at R16.50 to the dollar with 15 percent VAT added, a loose one carat lands at roughly R72,000 to R92,000. The second is the local shop end: in July 2026 I priced 73 one carat listings across 18 sellers, 17 of them South African, and finished one carat rings at premium showrooms ran R105,000 to R428,000, a band that includes the setting and rests on three listings of three different specifications.

Two things follow for anyone weighing a subscription. First, if a marketplace quote lands well under that list-derived figure once freight, insurance, clearance and VAT are on it, treat it as a flag rather than a bargain. It usually means a downgraded stone, an off-spec parcel, or a sticker that quietly left out the VAT and the import. Second, notice which lever is doing the work. A platform that wins you two or three points off list is competing for the small number. The big number is decided by where the stone is finally sold: retail convention is keystone, roughly double the trade cost at the counter and roughly three times at a branded showroom, while margins between one trade level and the next are commonly 3 to 5 percent a hop.

Keep the lab-grown filter switched off while you are sourcing natural goods, and price that market on its own terms if you go into it at all. The wholesale series has fallen somewhere between 70 and 96 percent depending on which base year and which size you measure, it is still easing down even as the pace of the fall slows, and published estimates put resale at somewhere between 10 and 40 percent, on estimates that disagree sharply with each other, of what was paid, with several large retail groups refusing these stones on trade-in altogether. Cross-referencing one against the other is how a natural quote ends up anchored to a number that will not hold. The wholesale diamond pricing explainer and the Rapaport discount methodology break down how the natural layers stack.

How to evaluate dealers within these marketplaces

Both platforms host individual dealers and quality varies widely. Apply this checklist before buying from any unfamiliar marketplace dealer:

Verify member good-standing in RapNet’s directory or IDEX’s member list
Cross-check against the Diamond Dealers Club, the Jewellery Council, or SADPMR member directories for trade-association membership
Request the GIA cert number before payment and verify it at https://www.gia.edu/report-check
Use a credit card for the first one to three orders for chargeback protection, then switch to wire only once trust is established
Read recent complaints in the marketplace’s dispute records (RapNet publishes, IDEX is less transparent)
Avoid pricing that is too good to be true. RAP-minus 50 percent or more on top-grade goods is a flag for off-spec stones or a scam
Remember you still will not see the stone until it lands. If that matters for the sale, buy from a seller who lets you inspect first

Sources and references

This article cites the following authoritative sources. Each was verified at the publication date shown.

GIA (Gemological Institute of America) for diamond grading standards and Report Check verification: gia.edu and gia.edu/report-check
De Beers Group for the Sightholder programme and DBCM Beneficiation Customer transparency disclosures: debeersgroup.com
The Diamond Dealers Club of South Africa for trade member listings and member-good-standing: diamonds.org.za
Jewellery Council of South Africa for jeweller member directory: jewellery.org.za
South African Diamonds and Precious Metals Regulator (SADPMR) for SA regulatory framework and supplier registration: sadpmr.co.za
Kimberley Process Certification Scheme for international rough-diamond compliance: kimberleyprocess.com
Responsible Jewellery Council (RJC) for chain-of-custody standards: responsiblejewellery.com
Rapaport and Rapaport Store for industry pricing benchmarks: rapaport.com, store.rapaport.com
Diamonds Act 56 of 1986, as amended by the Diamonds Amendment Act 29 of 2005 and the Diamonds Second Amendment Act 30 of 2005 (both in force 1 July 2007), plus the Diamond Export Levy Act 15 of 2007, for the SA cutting-industry regulatory framework: gov.za. There is no statute called the “Diamonds Act 56 of 1986, as amended by the Diamonds Amendment Act 29 of 2005 and the Diamonds Second Amendment Act 30 of 2005 (in force 1 July 2007)”
South African Advertising Regulatory Board (ARB) code of conduct: arb.org.za

The loose-stone figures in this article are arithmetic on the published Rapaport round list of 20 March 2026, with the discount, exchange rate and VAT stated in the text so you can redo them. The showroom band comes from my own July 2026 pricing of 73 one carat listings across 18 sellers, 17 of them South African and one an international online retailer, with 71 rows carrying a price; the premium showroom range rests on three of those listings at three different specifications and describes finished rings including their settings. The inventory-specification figures come from a separate June 2026 listing of 230 GIA-certified natural diamonds across six sellers, which is used here only for what is stocked and never for price. I publish the rand figures as bands rather than as individual stone-and-price pairs, because a band describes a market while a single row describes one business. Marketplace subscription and inventory figures were triangulated across published listings and trade-press references current as of the update date. Specific quotes for specific stones must come from the supplier directly, and neither dataset can tell you what a given dealer will quote you or what a particular shipment will cost to land. Editorial opinion reflects the research conducted at the update date and may change as new information becomes available.

For our complete editorial methodology, conflict-of-interest disclosure, and corrections process, see the editorial policy.

RapNet vs IDEX Online Jewelers (2026): Which B2B Diamond Marketplace Wins?