4Cs.co.za report lens
Buyer profile
- Shape
- Oval / round
- Carat
- 0.90-1.20ct
- Colour
- G-J
- Clarity
- VS-SI
- Cut
- priority
Match the paper to the stone before price, route, or resale.
Certificate-first diamond guide
The South African diamond decision guide
The 4Cs guide built for real diamond decisions.
Learn how cut, colour, clarity, and carat affect beauty, price, certificates, rings, and resale. Then speak to Prodiam when a real stone needs a serious view.
Exhibit 01 · colour under lightD–Z scale
DColourless · top of the scaleIcy white even loose. Priced for collectors and purists.
FColourless · premium pickStill reads pure white; a smarter spend than D for most buyers.
HNear-colourless · the sweet spotFaces up white once set; the classic value pick.
KFaint warmthVisible warmth loose; pairs beautifully with yellow gold.
MNoticeable warmthA distinct tint that frees budget for cut and carat.
48-hourvaluation process
72-hourcleared funds after acceptance
FICAcompliant process
BedfordviewJohannesburg, by appointment
Exhibit 02 · the 4C lens
Move the profile. Watch the buying story change.
A diamond is not one number. This quick lens shows why a certificate, visual inspection, and market route belong in the same conversation.
Best short answer
The 4Cs are not four separate scores. They are one value profile.
A larger diamond can be worth less if it leaks light, carries visible inclusions, has weak documentation, or sits in a narrow resale market.
Go-to guide promise
Every page gives a direct answer, a decision table, certificate context, and a specialist next step when the reader needs a specialist.
Start with the 4Cs
Four rooms. One decision.
Decision map
Find the guide that matches the job.
Buying, selling, valuing, comparing lab-grown, reading a GIA report, and choosing a shape need different answers.
Commercial guide
Diamond rings
Compare the centre stone, setting, metal, and certificate before judging the ring as a finished piece.
Buyer checklistEngagement rings
Balance beauty, budget, certificate confidence, natural-vs-lab-grown, and future tradeability.
Shape guideDiamond shapes
Round, oval, pear, marquise, emerald, cushion, princess, and what each shape changes.
ComparisonLab-grown vs natural
A clear comparison of disclosure, price gap, resale expectations, and natural-diamond fit.
Certificate literacyGIA report
Report number, inscription, 4Cs, proportions, fluorescence, plot, and comments.
Seller safetyDiamond buyers
How to choose a specialist buyer who explains the valuation and payment process.
Full diamond route map
Every useful diamond search gets a next step.
The site keeps broad diamond education on 4Cs.co.za, then routes serious buying, selling, valuation, and certificate questions to Prodiam.
Where to buy 16Where to buy diamonds in South AfricaDiamond jewellers versus dealers in SADiamond dealers and retailers in JohannesburgBuying diamonds in Cape TownTop-of-funnel diamond buying guide SAEngagement ring buying guide for SATrust signals for SA diamond buyersJohannesburg diamond retail mapBuying diamonds in PretoriaBuying diamonds in DurbanBuyer guidanceWhere to buy in JHBSpecialist dealerBuyer guidanceSA diamond tradeTrade and private supply
Sell and value 11Diamond buyersSellSelling guide for Johannesburg sellersSA scrap gold pricing guideDiamond valuation guide for SA ownersSelling in JHBSelling from Cape TownSelling diamonds in South AfricaDiamond insurance valuation in South AfricaSell and valueSell and value
Rings and settings 30Ring budgetRing insuranceDiamond ringsEngagement ringsWomen's diamond wedding jewelleryMen's diamond wedding jewelleryDiamond ring buying guideDiamond ring styles explainedLarge diamond rings for SA buyersSquare diamond ring shapes guideWomen's diamond wedding band buying guideDiamond and gemstone guideDiamond ring stylesWedding ringsRing stylesEngagement ring etiquette guideRing stacking and ceremony guideWhere to buy an engagement ring in SAEngagement ring etiquette and conventionRing settings and style guideRing types and their meaningsWedding rings in South AfricaWedding ring etiquette and conventionSilicone wedding rings for active menWhere to buy engagement rings in Cape TownWhere to buy engagement rings in JohannesburgWhere to buy engagement rings in PretoriaWhere to buy engagement rings in DurbanSell and valueRings and settings
Shapes and settings 12Oval diamond engagement ringsDiamond shapes explainedThree-stone ring guide for SA buyersEmerald and diamond ring buying guideEmerald and diamond ring style guideEmerald cut diamond guide for SA buyersDiamond ring stylesDiamond shapesDiamond shapesEngagement ringsDiamond shapesRing styles
Jewellery 13Diamond jewellery in Cape TownMen's diamond stud earringsDiamond stud earrings SAMen's diamond pendant jewelleryDiamond jewellery buying guideDiamond tennis necklace buyer guideDiamond jewellery guideDiamond jewellery guideDiamond jewellery guideDiamond jewellery guideDiamond jewellery guideDiamond ring stylesDiamond jewellery
Prices and carat 9Wholesale priceCaratPricesDiamond value and pricing context4Cs basics: carat vs karatSA gold pricing reference guideGold pricing and ZAR exchange explainedDiamond ring prices in South AfricaDiamond carat weight and size explained
Certificates and tests 6GIA vs EGLGIA reportDiamond verification guideGold testing guide for SA consumersDiamond authenticity visual guideAt-home diamond testing guide
Compare and context 11Lab vs naturalLab-grown resaleLab-grownFancy colour diamonds explainedDiamond educationDiamond ring guideDiamond ring guideWedding ringsDiamond ring stylesRing stylesDiamond science and formation
Gold and metals 6Diamond ring buying guideWedding ringsRing metal guide for SA buyersGold karat guide for ring buyersPremium metal comparison for buyersCertified diamond ring buying guide
Certificate-first lab
Turn any diamond question into a report check.
Whether the search starts with a ring, loose stone, GIA report, price, or shape, the decision path stays the same: identify the stone, read the 4Cs, inspect the actual diamond, then choose the route.
4Cs.co.za report lens
Seller profile
- Shape
- estate ring
- Carat
- verify
- Colour
- report
- Clarity
- plot
- Cut
- inspect
Match the paper to the stone before price, route, or resale.
Shape lab
Shape changes the inspection.
The same 1 carat weight behaves differently across round, oval, pear, emerald, princess, and marquise diamonds.
How the site should feel
Less brochure. More light study.
The guide is built around what a specialist actually checks: certificate identity, shape, measurements, light return, inclusions, setting condition, resale route, and whether the conversation needs Prodiam.
report
inspection
stone profile
route
Diamond brief builder
Before you contact anyone, collect these details.
This is the information that turns a vague diamond conversation into a useful one.
Use the checklistDirect answers
Questions this site answers in one line.
Cut, colour, clarity, carat, certificates, prices, rings, jewellery, lab-grown, valuation, and selling. Each link below opens the deeper guide.
Certificate-first
4Cs lens
Real stones
specialist next step
Buy, sell, value
What are the 4Cs?
Cut, colour, clarity, and carat are the four quality filters used to describe a diamond.
Read the guide Which C matters most?Cut usually has the biggest visual effect because it controls light return.
Read the guide What makes a diamond ring valuable?The centre stone, certificate, 4Cs, metal, condition, and resale route all matter.
Read the guide Can I price a diamond online?Only roughly. A real offer needs certificate details and inspection.
Read the guide Where should I sell a diamond ring?Use a specialist who verifies the stone, documents the process, and pays traceably.
Read the guideReady for a real diamond conversation?
Learn the certificate path for certified natural diamonds, estate jewellery, or a diamond-ring valuation.
Use the certificate, the report number, and an in-person inspection before treating any diamond guidance as transaction-ready. A qualified specialist can help once the real stone, documents, route, and condition are known.
Sources used