Collections, ProJewel by Prodiam
Diamond jewellery collections, made to your brief
Explore six starting points for a natural diamond jewellery commission: solitaire, three-stone, eternity, anniversary, heritage and bridal designs. Choose a style, then agree the diamonds, metal and complete quote with Prodiam in Bedfordview, Johannesburg. Some stones are cut in-house and most sourced through the certified trade.
New to the house? Start with the diamond jewellery category for who we are, how we price and where we sit in the South African market. The collections below are the made-to-order ranges within it.
How this diamond jewellery is built in Johannesburg
Every piece on this page starts at the cutting wheel. The centre stone is selected, cut to GIA Excellent grade at Procut Diamond Cutting Works or sourced to that spec, and then handed to the bench. A piece is designed around that specific stone. CAD, wax, casting, setting, polish, all in Bedfordview. We do not outsource manufacturing.
Calibrated sides for three-stone rings and eternity bands are cut from the same parcel where possible, so colour and clarity match within one grade across the piece. The Rapaport-discount wholesale pricing structure that applies to a loose Prodiam stone applies to the centre stone of any commission. The manufacturing labour is priced separately and quoted on the sketch.
Each collection below is a starting point, not a fixed catalogue. The brief at the start of the commission is what determines the final piece. Most pieces below have been made before in some form; bring a reference, an inherited stone, or a starting carat weight, and the bench will quote.
One stone, GIA Excellent cut, classical setting
The Solitaire Collection
Round brilliant and oval natural centre diamonds in six-claw, four-claw and basket settings. Compare the individual diamond and how the setting shows it; GIA overall cut grades apply to standard round brilliants, not ovals.
- For whom
- First engagement rings; replacement stones for a beloved heirloom setting; the buyer who has read enough to know that a GIA Excellent cut grade does the work of an extra colour grade.
- Lead stones
- 0.50, 0.70, 1.00, 1.50, 2.00 ct, GIA F to H, VS to SI1, Excellent cut grade.
- Related
- Bridal set design · Custom engagement rings · Loose diamonds
Past, present, future. Centre plus calibrated sides.
The Three-Stone Collection
Three-stone rings in classical and contemporary geometry. Centres from 0.70 to 3.00 carats with calibrated sides matched on the bench, never bought as a kit. Common pairings: round centre with round sides, oval centre with pear sides, emerald centre with trapezoid sides.
- For whom
- Anniversaries, vow renewals, the buyer who wants narrative meaning in the geometry of the ring.
- Lead stones
- Centres 0.70 to 3.00 ct, GIA D to H, sides cut at Procut DCW, or sourced, to match within one colour and one clarity grade of the centre.
- Related
- Bridal set design · Heirloom redesign · Story: a three-stone heirloom
Calibrated rounds, princesses, emeralds. Channel, shared-claw, U-set.
The Eternity Collection
Full and half eternity bands. Stones calibrated and matched on the bench. Cut grade enforced on every stone, not just the centres. Channel set, shared-claw and U-set construction available; we do not make pressure-set bands.
- For whom
- Anniversaries, push presents, the second band that meets the engagement ring at the knuckle.
- Lead stones
- Round, princess, emerald, baguette. 0.05 to 0.25 ct each, total weights 1.00 to 5.00 ct. Colour matched to within one grade across the band.
- Related
- The ProJewel range · Custom engagement rings · Bridal set design
Upgrades, milestone pieces, the second ring.
The Anniversary Collection
Built for the buyer who already owns a Prodiam stone and wants the next chapter. The Upgrade Promise honours a meaningful percentage of the original Prodiam invoice (typically seventy to ninety percent, benchmarked to Rapaport on the day) toward a larger or rarer centre stone. See the Upgrade Promise for the full framework.
- For whom
- Tenth, fifteenth, twenty-fifth anniversary buyers stepping up the centre stone, adding a halo, or commissioning a second piece to wear with the original.
- Lead stones
- Wide range. Most clients move from a 1.00 ct round to a 2.00 ct oval, or from a solitaire to a three-stone. We hold the previous stone in safekeeping while the new piece is being made.
- Related
- The upgrade promise · Heirloom redesign · Story: upgrading from a mall chain
Heirloom redesign. Inherited stones, reset for the next generation.
The Heritage Collection
The piece you commission when an inherited stone needs to come out of a setting that is no longer worn. We unset, repolish if the cut grade calls for it, and remount in a contemporary or period-faithful design. The original metal is melted down and either kept aside or used in the new piece, your choice.
- For whom
- The grandchild stepping into a great-grandmother's diamond. The widow remaking a wedding band into a pendant. The buyer who inherited a brooch and wants two earrings.
- Lead stones
- Anything you bring in. Recutting and repolishing handled at Procut DCW; metal work at the in-house bench.
- Related
- Heirloom redesign · Use your own stone · Story: a three-stone heirloom
Engagement ring, wedding band, eternity. Designed as one piece.
The Bridal Set Collection
A complete set designed at the same time, manufactured at the same bench, in the same metal lot. Engagement ring, wedding band that meets it at the shoulder without a gap, optional eternity band for an anniversary. Many buyers commission the engagement ring first and the set later; the original CAD file is kept on record so the bands match.
- For whom
- The buyer who wants the rings to read as one piece, not three accidents.
- Lead stones
- Engagement centre 0.70 to 3.00 ct. Wedding band set with calibrated natural diamonds. Eternity band typically commissioned at the first or fifth anniversary.
- Related
- Bridal set design · Custom engagement rings · The ProJewel range
Our diamond jewellery collections, common questions
Does Prodiam make fine diamond jewellery in South Africa?
Yes. Prodiam designs and makes natural diamond jewellery in Bedfordview, Johannesburg. These six collections offer starting points for your commission, with the final stone selection, setting and metal agreed in the brief. Some diamonds are cut at Procut DCW and most sourced through the certified trade.
What kinds of diamond jewellery do the collections cover?
Six named diamond jewellery collections: solitaire engagement rings, three-stone rings, full and half eternity bands, anniversary and upgrade pieces, heirloom-redesign work, and complete bridal sets. Each is a starting point rather than a fixed catalogue. The brief at the start of a commission is what decides the final piece, so bring a reference, an inherited stone, or a target carat weight and the bench will quote.
Can I buy diamond jewellery directly from the manufacturer in Johannesburg?
You can commission directly through Prodiam in Bedfordview, Johannesburg. We discuss the design, propose suitable natural diamonds and quote for the complete piece before making. Compare the individual stones, metal, making and service when assessing that quote against another seller.
Are the diamonds natural or lab-grown?
Natural only. Prodiam is a natural-diamond house. Every centre stone is a natural diamond and GIA-graded where applicable; rounds we cut ourselves are polished to the GIA Excellent standard. We do not set lab-grown or moissanite centre stones, and we will refer you to specialists if that is what you are after.
How do I commission a piece of bespoke diamond jewellery?
Send a sketch, a reference photo, or a target carat weight to darren@prodiam.co.za, or use the contact form. The bench quotes within one working day on most commissions. The deposit is fifty percent, with the balance due on completion, and lead times run six to ten weeks depending on complexity. Insured nationwide delivery is included.
Where is Prodiam based, and can buyers outside Johannesburg order?
Prodiam works from one viewing room at Suite F1W6, The Paragon, in Bedfordview, Johannesburg, in the same building as the Procut DCW cutting works. Buyers anywhere in South Africa work with us remotely through video viewings, GIA report PDFs and insured overnight dispatch. See the national service page for how a remote SA commission runs end to end.