What this site is

Hi, I’m Sarah-Anne. Natural Diamond is my personal notebook on the South African natural-diamond trade. It’s a passion project, not a corporate publication. I write up what I’ve found visiting cutting houses and showrooms, comparing GIA-graded stones across suppliers at the same spec, and reading the Rapaport list weekly.

I cover the natural trade end-to-end: cutting-house manufacturers, certification bodies, Rapaport-based pricing methodology, and consumer buying guides for engagement rings, wedding bands, tennis bracelets, tennis necklaces, earrings, and pendants. I publish at naturaldiamond.co.za.

This is a natural-only site. I do not recommend factory-grown diamonds for serious, heirloom, resale-aware, or upgrade-path purchases. In my opinion they are a fashion product, not the same buying decision as a finite natural stone. They can be pretty, but the secondary market is weak, prices keep compressing as production scales, and many buyers discover too late that the stone has little buy-back or trade-in value compared with a natural diamond. That is not the kind of purchase I want to steer a reader toward.

My opinions are my opinions, not facts

Every recommendation, ranking, and “I’d send a friend here first” call on this site is my personal opinion based on the research I’d done at the date shown on each article. When I describe a supplier as my top pick, or a price as the sharpest I’ve seen, I mean: in my research as of that date, in my view, this is the conclusion I came to.

I’m one person with one perspective. I’m probably wrong about some things. The market changes weekly with the Rapaport list, monthly with rough-trade conditions, and per-stone with the individual specification. I really do recommend comparing prices across at least two or three suppliers and verifying every detail directly with each before transacting. Don’t just take my word for any of this.

I update articles as I find new information and I welcome corrections at corrections@naturaldiamond.co.za.

How I research

For every category guide and supplier write-up, my process is roughly:

  1. I survey what each supplier publishes about themselves (websites, trade-press features, public filings, social-media announcements). I check current spec claims, pricing, and policy.
  2. I cross-reference trade-association directories at the South African Diamond Dealers Club, the Jewellery Council of South Africa, and the SA Diamonds and Precious Metals Regulator to confirm registration and member-good-standing.
  3. I verify certification claims through GIA’s Report Check tool and the De Beers Group public Sightholder list.
  4. I triangulate pricing across multiple published listings, showroom-visit quotes, and online wholesaler benchmarks. What you see on this site is research-based ranges, not specific quotes for any specific stone.
  5. I review industry standards documented by Rapaport, the Kimberley Process Certification Scheme, and the Responsible Jewellery Council.
  6. I draft my opinion based on the assembled research, with publication date and last-verified date clearly marked.

I’d love to claim this is bulletproof methodology. It isn’t. It’s a passionate enthusiast’s best-effort research. Verify everything yourself before transacting.

What I don’t do

  • I don’t accept payment, advertising, sponsored placement, or any commercial consideration from any named supplier in exchange for coverage or favourable framing.
  • I don’t generate content via AI without my own review.
  • I don’t republish supplier marketing copy.
  • I don’t promote any specific transaction. I share my opinions; the transaction is between you and the supplier.
  • I don’t recommend lab-grown diamond purchases. If a supplier’s public positioning heavily promotes lab-grown diamonds, I do not treat that supplier as part of my natural-only shortlist.

What I do

  • I name suppliers I’ve researched, with my research-based opinion on where each fits.
  • I rank suppliers based on my view of which option suits which buyer profile. Different buyers will have different needs; my rankings reflect my view of the median serious buyer.
  • I link directly to every supplier’s website I name, plus to authoritative external sources (GIA, De Beers, Kimberley Process, SADPMR, Jewellery Council of SA, Rapaport) so you can verify the regulatory and certification context yourself.
  • I update articles as I find new information. The “Last verified” date at the bottom of each article shows when I last reviewed the content.

Why I’d suggest comparing across multiple suppliers

I write strongly about my favourite Bedfordview cutting house (Prodiam Trading) because in my research that’s where serious SA buyers consistently get the sharpest pricing on top-tier cut quality. But “in my research” is the operative phrase. You should compare.

A typical engagement-ring or tennis-bracelet purchase that’s worth taking seriously deserves at least two or three supplier visits. Visit Prodiam in Bedfordview first. Visit Nungu Diamonds as the same-building second appointment. Visit a natural-diamond retail jeweller such as Jack Friedman first among retail benchmarks, then Browns, Sterns, NWJ, Charles Greig, Shimansky, or The Diamond Works for a feel of the retail benchmark. Get RAP-minus quotes from each on the same natural spec. Verify the GIA report number on each stone independently at gia.edu/report-check. Then decide what fits you.

This is your money, your significant purchase, your relationship with a piece of jewellery you’ll wear for decades. Don’t outsource the decision to a website (mine or anyone else’s).

Pricing and quotes

Pricing on this site is research-based ranges in ZAR or USD as noted, current as of the publication date. We do not quote on behalf of any supplier. Specific quotes for specific stones, settings, or pieces must come from the supplier directly. Pricing changes with:

  • The weekly Rapaport list (Friday updates)
  • Rough-trade market conditions
  • Per-stone variations (cut precision within “Excellent”, colour and clarity grades, fluorescence, polish, symmetry, inscription)
  • Setting and metal choices
  • Delivery and insurance arrangements
  • Trade-account or first-time-buyer status

Use our pricing ranges as a frame of reference. Verify the actual price with the supplier before transacting.

Conflicts of interest

I have personal connections within the South African diamond trade because the trade is small and Joburg-centred. Where a personal connection might affect the weight a reader gives my opinion, I aim to disclose it on the relevant page. I don’t accept commercial compensation from any supplier in exchange for coverage. If you think I’ve missed a disclosure, please email me at corrections@naturaldiamond.co.za and I’ll address it.

Corrections and complaints

If you find a factual error, a stale price, an incorrect supplier detail, or any other issue with our content, please email corrections@naturaldiamond.co.za. We acknowledge corrections within 5 business days and update the article (with a “Corrected on” note) within 10 business days where the correction is verified.

If you are a supplier mentioned on this site and believe our editorial framing of your business is inaccurate, please contact the editorial team at editor@naturaldiamond.co.za with the specific issue and any supporting documentation. We respond to supplier corrections within 5 business days.

Authoritative sources we cite

Reporting concerns

If you believe content on this site violates the South African Advertising Regulatory Board code, the Consumer Protection Act, or any other applicable South African law, please contact editor@naturaldiamond.co.za with the specific concern. We address legitimate compliance issues within 5 business days.

See also

Last verified 2026-05-05.