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Custom High Jewellery
A reference, a budget, a deadline. We return a rendered design, a stone shortlist and a fixed price.
DiscoverFrom the mine to your finger.
Natural · Certified · Set by Hand
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The Mine
It begins in darkness. We walk into our own mine — every Nadilini stone has a birthplace we can point to.
The one thing we will not bend on
We deal only in natural diamonds.
Every stone, a certificate. Every certificate, independent.
If a diamond in our vault did not come out of the ground, it does not go on this site.
The Assembly
Every part, accounted for
The Fire
Look inside it
Not a rendering
This is our mine, filmed on site
Sourced at origin
"We take great pleasure in assisting our customers with choosing only the highest quality and the rarest stones to cater for their specific needs." Every diamond is chosen for its cut, color, clarity and carat weight — "the larger, whiter and cleaner the diamond, the more rare it is."
Certified, always
"It is the cut that enables a diamond to make the best use of light" — a good cut "has more scintillation, more sparkle." Clarity is graded honestly: no clarity-enhanced diamonds are ever sold.
Four houses under one roof
What Nadilini makes
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Rare & Investment Stones
Fancy yellows, blues, D-flawless. Sourced to a written brief, insured in transit by Lloyd’s.
Discover
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Collection
Strung, graded and matched to order, or designed from nothing if the piece calls for it.
Discover
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Gold & the Refinery
We refine our own metal, quote honestly on gold movement, and take old pieces in part-exchange.
DiscoverNothing repeats twice
Every piece, under one roof
Sapphire, pearl, opal, emerald. Cut, set and finished by us — no two pieces the same, because no two clients are.
One family, from the ground up
Our sister companies
“The world’s longest established diamond brokerage and consultancy firm” — and, more recently, “the largest global independent diamond and gemstone tender and auction house.” A fifth-generation, family-owned firm.
Visit bonasgroup.com →Sets “the standard for sustainable mining” across diamond, chrome and coal operations — sustainability “is at the heart of what we do.” Based in Kimberley, South Africa.
Visit downtownmining.com →“We believe that diamonds are valuable and maintain their value, that is if you buy them at the right price.” A longstanding family tradition, working worldwide with sales representatives across various countries.
Visit cmrdiamonds.com →“Building relationships with our clients and suppliers is a key fundamental” — striving “to achieve win-win scenarios so all parties benefit in the value of a transaction.”
Visit downtowndiamonds.com →Our own gold refinery — no public site to cite, just the refinery itself, running.
Bonas Group
“The world’s longest established diamond brokerage and consultancy firm” — and, more recently, “the largest global independent diamond and gemstone tender and auction house.” A fifth-generation, family-owned firm.
Visit bonasgroup.com →
Downtown Mining
Sets “the standard for sustainable mining” across diamond, chrome and coal operations — sustainability “is at the heart of what we do.” Based in Kimberley, South Africa.
Visit downtownmining.com →
CMR Diamonds
“We believe that diamonds are valuable and maintain their value, that is if you buy them at the right price.” A longstanding family tradition, working worldwide with sales representatives across various countries.
Visit cmrdiamonds.com →
Downtown Diamonds
“Building relationships with our clients and suppliers is a key fundamental” — striving “to achieve win-win scenarios so all parties benefit in the value of a transaction.”
Visit downtowndiamonds.com →
Downtown Refinery
Our own gold refinery — no public site to cite, just the refinery itself, running.
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One piece. Yours alone.
A Nadilini commission begins with a conversation and ends with a piece that will never be made again — not anywhere in the world. Our stone, our gold, your story.
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01
The brief
Tell us what you imagine — a sketch, a photograph, a feeling.
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The conversation
Forty-five minutes with our designer, in the Sandton atelier or by video.
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The design
Concepts, a stone selected from our own line, a quotation — secured with a design fee credited to your piece.
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The making
Cut, cast, set and delivered — or placed on your hand at the atelier.
Enquiries
Tell us what you are looking for
A shape, a carat weight, a budget, an occasion — any one of them is enough to start. We answer personally, usually the same day.
- Ask the atelier +27 00 000 0000
- Email enquiries@alta.example
- By appointment Johannesburg