KAYNNE
& Associates

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KAYNNE
& Associates
Jewellery & Gemplex · DMCC Dubai
KAYNNE
& Associates

Exceptional diamonds, placed privately.

A Dubai trading house specialising in rare natural polished diamonds, working with private clients, collectors and qualified buyers.

How to begin

Three ways in.

For buyers

Acquire

Access selected stones and off-market opportunities, viewed privately in Dubai.

View the collection
For sellers and mandates

Place a stone

Valuation, qualified introductions and settlement, with a defined process and timeline.

Consignment & mandates
For specific requirements

Source to brief

Describe the stone you are looking for. We search our network and report back privately.

Private sourcing
Our focus

Exceptional polished diamonds

Stones of this calibre represent a small fraction of global production. Every diamond we place carries an independent GIA report, with the number published.

  • White diamonds, D to F colour, FL to VVS clarity
  • Fancy colour diamonds — yellow, pink, blue
  • Significant weights, triple excellent cut
  • GIA certificated, verifiable independently
  • Natural stones only — never laboratory-grown

Stones are held in Dubai and shown by appointment. We do not publish prices; each placement is discussed privately, following identity verification.

Also traded

Beyond the stone

Three further lines, each kept deliberately narrow. All are handled with the same discretion and the same documentation as a diamond placement.

Diamond necklace, double row with cushion-cut centre stone and pear drop
Placed privately · 2026
01 · Important Jewellery

Pieces that never reach a catalogue

Exceptional jewels bought and placed away from the saleroom. Signed and period pieces, single commissions, and necklaces built around a centre stone that would carry its own report were it loose.

Where provenance permits we disclose maker, period and prior ownership. Where a seller requires anonymity, we do not — and we say so rather than leave the question open.

Signed piecesHigh jewelleryEstateOff-market
02

Rare Gemstones

Sourced against a brief rather than held in stock. Ceylon sapphires, untreated rubies, and material as scarce as taaffeite — counted among the rarest gem species known.

Blue sapphiresRubiesTaaffeiteBy brief
03

Gold & Precious Metals

Physical metal for established relationships. We do not quote publicly; allocations are discussed directly and settled against delivery or vaulting, as the client prefers.

Gold barsBullionPrecious metals

Natural origin

Every stone we handle is a natural diamond.

We do not trade laboratory-grown material — not as a sideline, not on request, not at any price. Natural origin is stated plainly on each stone's GIA report, which distinguishes a mined diamond from a grown one, and that report is released to you before any transaction.

Selected opportunities

Currently on the books

Every stone is shown with full certification and viewed by appointment. Values are never published — they are discussed privately, in confidence.

Pear-shaped Fancy Intense Blue diamond, 18.73 carats
KA-D-0120 · Off-market

18.73 ct Fancy Intense Blue

A pear modified brilliant of a colour that reaches the market perhaps once in a generation, and Internally Flawless with it. Held privately and never publicly offered, which is why it appears in no saleroom record.

Carat weight18.73 ct
ClarityIF
Colour gradeFancy Intense Blue
Measurements22.52 × 15.09 mm
Available
View full details
Pear-shaped Fancy Intense Pink diamond, 37.64 carats
KA-D-0121 · Off-market

37.64 ct Fancy Intense Pink

A pear modified brilliant at a weight that places it among the largest pink diamonds in existence — and graded Flawless, without internal or external characteristic under ten-power magnification. Held privately, outside any public record, and shown only to buyers introduced to us.

Carat weight37.64 ct
ClarityFL
Colour gradeFancy Intense Pink
Measurements29.59 × 16.99 mm
Available
View full details
Cushion-cut Fancy Pink diamond, 6.81 carats
KA-D-0118

6.81 ct Fancy Pink

Radiant cutInternally FlawlessEven distributionGIA certificated
Available
View stone
Matched pair of heart-shaped Fancy Deep Blue diamonds, 2.22 and 2.00 carats
KA-D-0119 · Matched pair

2.22 & 2.00 ct Fancy Deep Blue Hearts

Heart brilliant4.22 ct totalMatched for colour and cutGIA certificated
Available
View stones
Cushion modified brilliant Fancy Yellow diamond, 102.08 carats
KA-D-0117

102.08 ct Fancy Yellow

Cushion modified brilliantVS2Over 100 caratsGIA certificated
Available
View stone
Further stones are held privately and are not listed here. Enquire for the full book
Value

Prices are discussed privately, never published.

No figure appears on this website, in any currency, for any stone or piece. A published price invites comparison with stones that are not comparable, and a diamond of this calibre is not a commodity with a screen value.

Terms are agreed directly with the client, once we know who we are speaking to. It is also how we protect the seller, who in most cases has asked not to be named at all.

Assurance

What stands behind every stone

Three things a buyer should be able to check without taking our word for any of them.

Certification

Natural, and graded by someone else

Every stone carries a GIA report, which states its natural origin. We release the number to you directly, not to the internet, so you can check the laboratory's own record rather than take ours. A published number is traceable and would expose the stone's history and its seller. If a report cannot be verified, the stone is not offered.

Report released on introduction
Location

Where the trade happens

We work from the Jewellery & Gemplex at the Dubai Multi Commodities Centre — the centre of the emirate's stone trade. Stones are held here, and examined here rather than travelling to a meeting.

Viewing by appointment
Compliance

Origin and obligations

Each invoice carries a System of Warranties declaration confirming conflict-free origin. As a dealer in precious stones we run identification and anti-money-laundering checks — on every party, every time.

Checks precede any viewing
How we work

From first contact to settlement

The same four stages apply whether you are acquiring a stone, placing one, or asking us to find something specific.

01

Introduction

You tell us what you are looking for, or what you hold. Every enquiry is answered personally, and nothing is circulated further.

02

Verification

Identity and source of funds are confirmed before a stone is shown. It is a legal obligation on our side, and a protection on yours.

03

Viewing

The stone is examined in Dubai, by you or by a gemmologist you appoint, alongside its GIA report and under light of your choosing.

04

Settlement

Terms are agreed privately. Transfer, insurance, and delivery or vaulting are arranged to your instruction and documented in full.

Contact

Introductions are made privately.

Tell us what you are looking for, or what you hold. Every enquiry is read by a principal of the house, and a meeting in person can always be arranged.

The House

Built on relationships, not on a shopfront.

Kaynne & Associates sources, represents and places exceptional assets for clients who prefer not to transact in public. Most of what passes through this house is never advertised, never catalogued, and never discussed outside the parties involved.

Business profile

What we are

A private international company working in exceptional assets and the opportunities that surround them.

The centre of it

The natural diamond, and everything that gathers around one.

Rare stones, fancy colours, and pieces of a calibre that rarely reaches an open market. Around that sit coloured gemstones, gold and precious metals, and collector-grade assets acquired to be held rather than worn.

The work rests on a network built across the international stone trade over years, through which we hear of material before it is offered and often before it is cut — and on the discipline to keep every one of those relationships confidential, which is the only reason they continue to produce.

We act for one side of a transaction, and we say which. A buyer engaging us is represented against the market, not against a stone we happen to be holding. An owner appointing us to place a piece is told what we believe it is worth, including when that is less than they hoped.

Nothing here is a volume business. We would rather place four stones properly in a year than move forty and be remembered for none of them.

How we choose
We decline more than we take on. An asset we cannot document, verify or explain is one we will not put in front of a client.
Main areas of business

What we trade

Grouped by discipline. Each carries its own certification, documentation and compliance requirements.

01

Diamonds

Rare and exceptional polished stones, and fancy colour diamonds in particular — blue, pink and yellow. Matched pairs and suites where the difficulty lies as much in the matching as in the stones themselves.

PolishedFancy colourBluePinkMatched pairs
02

Rare gemstones

Sourced against a specific brief rather than held in stock. Ceylon sapphires, untreated rubies, and material as scarce as taaffeite — counted among the rarest gem species known.

Blue sapphiresRubiesTaaffeiteBy brief
03

Metals & collector assets

Physical gold and precious metals for established relationships, alongside collector-grade and investment-grade assets acquired to be held. Settled against delivery or vaulting, as the client prefers.

Gold barsBullionCollector-gradeInvestment-grade
Representation & mandates

What we do

Five services, each with defined terms agreed in writing before any asset is shown or discussed.

01

International sourcing

You describe what you are looking for — a weight, a colour grade, a shape, a ceiling. We search the network and report back with what exists, what it will cost, and what we think of it. Where nothing suitable is available we say so, rather than offer a substitute and call it a find.

02

Buyer representation

We act for the buyer and against the market. That means negotiating on your behalf, verifying certification and documentation independently, arranging inspection by a gemmologist of your choosing, and telling you plainly when a price is wrong for the stone.

03

Seller representation

Owners who wish to sell privately appoint us to find the buyer. Reserve, timeframe and fee are agreed before anything is shown, and the owner's identity is disclosed to no one without written instruction. Discretion here is not a courtesy; it is usually the reason the piece is with us at all.

04

Private mandates

Where a party holds a written mandate over an asset, we verify the mandate at source before acting on it. Unverified mandates passed from hand to hand are the most common way time is wasted in this trade, and we do not pass them on.

05

Transaction coordination

Escrow, inspection, insurance in transit, export documentation, and delivery or vaulting — coordinated across jurisdictions and documented in full, so that both parties finish the transaction with a complete file rather than a receipt.

The house

Where we are

Kaynne & Associates is the trading name of MZB Trading DMCC.

Established2021
JurisdictionDMCC, Dubai
OfficesJewellery & Gemplex 3
Working languagesEnglish, Arabic, French
Who we work with

Introduced, verified, and known to us.

Private collectors and high-net-worth individuals, investors and family offices, jewellery professionals, qualified international buyers, selected sellers, authorised mandate holders and established traders.

Every party is identified before an asset is shown. It is a legal obligation on our side and, for anyone holding something worth protecting, a reassurance on theirs.

Contact

Introductions are made privately.

Tell us what you are looking for, or what you hold. Every enquiry is read by a principal of the house, and a meeting in person can always be arranged.

Contact

We would rather meet you than message you.

Write to us and a principal of the house will answer personally. If you would prefer to speak face to face, a meeting can always be arranged — at our offices in the Jewellery & Gemplex, or wherever the circumstances require.

In person

A meeting is always available

No stone of consequence has ever been bought from a photograph. Whatever form the first contact takes, we expect to meet.

01

At our offices

Jewellery & Gemplex 3, at the Dubai Multi Commodities Centre. Stones are held here and examined here, under light of your choosing, with as much time as you need.

02

Wherever you are

Where circumstances require it and the transaction warrants it, we will travel to meet you, or arrange a secure viewing in a location agreed between us.

03

Through your own expert

You are welcome to appoint an independent gemmologist or adviser to examine a stone on your behalf. We encourage it, and we make no difficulty about arranging it.

Contact

Introductions are made privately.

Tell us what you are looking for, or what you hold. Every enquiry is read by a principal of the house, not a shared inbox.

Preferred reply

Your details are used to answer this enquiry and nothing else. Before any stone is shown we confirm identity and source of funds, as we are required to do and as the sellers we act for expect.

Received

Thank you. Your enquiry has reached us.

We answer every enquiry personally, normally within one working day. Nothing you have written is circulated beyond the principals of the house.

  • 01A principal reads your enquiry and replies directly.
  • 02We confirm identity and source of funds before anything is shown.
  • 03A viewing is arranged in Dubai, in person or by a representative you appoint.
Direct
Office
Unit No. BA90, Level 1
Jewellery & Gemplex 3
Dubai Multi Commodities Centre
Dubai, United Arab Emirates
Phone
+971 55 537 6297
WhatsApp available
Hours
Sunday to Thursday
09:00 – 18:00 GST
Viewings
By appointment only, following identity verification
Services

Five ways to engage a house like this one.

Each is a defined piece of work with terms agreed in writing before anything is shown, searched for or discussed. We act for one side of a transaction and we tell both sides which.

01

Private sourcing

You describe what you want and we go and find it. A brief rather than a catalogue — a weight, a colour grade, a shape, a ceiling and a timeframe — against which we search our own book and the wider network.

How it runs
  • 01The brief is agreed in writing, including what you would accept and what you would not.
  • 02We search our own holdings first, then the network, then material not yet cut.
  • 03We report back on everything found, including the stones we advise against and why.
  • 04You shortlist. We arrange viewing and, if you wish, negotiate on your behalf.
What it includes
  • A written brief, so that neither side is working from memory
  • A market report on what exists at your parameters
  • Independent verification of every certificate before viewing
  • Viewing arranged in Dubai or at a location agreed between us
  • No obligation to proceed, and no fee if nothing suitable is found
02

Buyer representation

We act for the buyer and against the market. That is a different job from selling you a stone, and it is the reason we will tell you when a price is wrong even though a sale would pay us.

How it runs
  • 01An engagement letter defines scope, duration and how we are paid.
  • 02Certification is verified with the laboratory that issued it, not with the seller.
  • 03Inspection is arranged, by us or by a gemmologist you appoint.
  • 04We negotiate, and we coordinate settlement through to delivery.
What it includes
  • Certificate verification at source
  • Treatment, origin and condition established before any offer
  • Comparable evidence, so the price is judged against something
  • Negotiation conducted on your instruction, not on our margin
  • A complete transaction file at close, not a receipt
03

Seller representation and placement

Owners who wish to sell privately appoint us to find the buyer. No listing, no catalogue, no saleroom — and no disclosure of who you are without your written instruction.

How it runs
  • 01We give a written opinion of value, including when it is lower than hoped.
  • 02Reserve, timeframe and fee are agreed before anything is shown to anyone.
  • 03We approach qualified buyers directly and individually.
  • 04Settlement, export and transfer are handled through to completion.
What it includes
  • A written valuation opinion you may use elsewhere
  • Anonymity maintained by default, at every stage
  • Targeted approach rather than broadcast
  • Every prospective buyer identified before your asset is described
  • Full settlement and export documentation
04

Private mandates

Where a party holds a written mandate over an asset, we verify that mandate at source before acting on it. Unverified paper passed from hand to hand is the most common way time is lost in this trade.

How it runs
  • 01The mandate is checked with the principal who granted it.
  • 02Intermediary chains are collapsed to the parties who actually hold something.
  • 03Scope, term and fee are set out in writing before introduction.
  • 04If the mandate cannot be verified, we decline and say so.
What it includes
  • Verification at source, every time
  • Direct contact with principals rather than with intermediaries
  • A defined term, after which the mandate lapses
  • No onward circulation of documents we cannot stand behind
05

Transaction coordination

The part that decides whether a transaction closes cleanly. Escrow, inspection, insurance, export and custody, coordinated across jurisdictions so that both parties finish with a complete file.

How it runs
  • 01Payment structure agreed — escrow or bank to bank — before movement.
  • 02An inspection window is defined and written into the terms.
  • 03Insurance in transit is arranged and evidenced.
  • 04Export documentation is prepared, and delivery or vaulting arranged.
What it includes
  • Escrow or bank-to-bank settlement, as the parties prefer
  • Insured, tracked and documented transit
  • Export and customs documentation prepared in full
  • Vaulting arranged where the buyer prefers not to take delivery
  • A closing file: certificates, invoices, warranties, transport records
Terms of engagement
Nothing begins until scope, duration and fee are set down in writing.
Boundaries

What we will not do

Stated plainly, because in this trade what a house refuses tells you more than what it offers.

Act for both sides

We represent the buyer or the seller, never both in the same transaction, and the side we act for is disclosed to everyone involved.

Pass on unverified paper

Mandates, offers and certificates we cannot verify at source do not leave this house, whoever sent them and however urgent they are said to be.

Trade laboratory-grown material

Not as a sideline, not on request, not at any price. Every diamond we handle is natural, and its origin is stated on its report.

Promise a return

Stones are physical assets, not securities. They are illiquid, they carry a spread between acquisition and resale, and nobody can honestly tell you otherwise.

Show a stone before identification

Identity and source of funds are confirmed first, every time, with no exception made for anyone regardless of who introduced them.

Quote in public

No figure appears on this website or in any circulated document. Value is discussed directly, which is also how the seller's position is protected.

Contact

Tell us which of these you need.

Or describe the situation and we will tell you honestly whether it is one we can help with. A meeting in person can always be arranged.

Client profile

Who sits on the other side of the table.

Kaynne & Associates works with a small number of clients on either side of a transaction. Some are acquiring, some are placing, and some are professionals in the trade. What they have in common is that each was introduced, identified and known to us before anything was shown.

Who we work with

Three sides of the same table

Grouped by what a client is trying to do, rather than by how much they are worth.

01

Those acquiring

Collectors building a holding over years, individuals buying a single stone that will not be sold in their lifetime, and offices acquiring on behalf of a family. The brief differs; the requirement does not — certainty about what is being bought, and discretion about who is buying it.

Private collectorsHigh-net-worth individualsInvestorsPrivate offices
02

Those placing

Owners who wish to sell without a saleroom, and mandate holders acting for them with written authority. Both are told the same thing: what we believe the asset is worth, who we intend to approach, and what we will not do with their name.

Selected sellersAuthorised mandatesEstates
03

The trade

Jewellers sourcing a centre stone for a commission, dealers with a buyer but not the material, and international traders who need a counterparty in Dubai. Trade terms are set out separately and agreed before a stone is described.

Jewellery professionalsQualified buyersInternational traders
The common requirement
We would rather work properly with four clients than quickly with forty.
Working together

What each side owes the other

Set out here rather than discovered later, so that nobody is surprised by a requirement halfway through a transaction.

We ask of you

Four things, and only these.

  • Identification, and evidence of the source of funds or of title. This is a legal obligation on us and an expectation of the sellers we act for.
  • A single point of contact. Transactions that pass through a chain of intermediaries rarely close, and we would rather say so at the start.
  • A realistic brief. A weight, a colour, a ceiling. Precision costs nothing and saves months.
  • Patience. Material of this calibre appears when it appears, and we will not fill the gap with something lesser.
You may expect of us

The same standard, in return.

  • A reply from a principal of the house, normally within one working day.
  • Your name disclosed to no one, on either side, without your written instruction.
  • An honest opinion of value, including when it is not the one you were hoping for.
  • A clear answer when we cannot help, rather than an introduction that wastes your time.
Contact

If you recognise yourself here, write to us.

Tell us which side of the table you are on and what you are trying to do. A meeting in person can always be arranged.

Company position

Five words, and what each one costs us.

Private. Discreet. International. Exclusive. Relationship-driven. Any house can claim these; they are worth something only where they carry a price. Set out below is what each one means here and what we give up in order to keep it true.

Positioning

What we stand for, in practice

Confidentiality, professionalism, trusted relationships and personal service — described by what they require rather than by what they sound like.

01

Private

No public listings, no published figures, no client names. The record of what has passed through this house exists, and it is not on this website. A transaction conducted privately is not a transaction conducted vaguely — every party to it holds a complete file.

02

Discreet

Discretion is a practice rather than a promise. Identities are disclosed on written instruction and on no other basis. We publish no case studies, name no clients, and do not use a completed transaction as marketing, however impressive it was.

03

International

Dubai is the seat, chosen because more rough and polished material passes through this emirate than almost anywhere else. The network reaches to where stones are cut, where they are held, and where the buyers for them actually live.

04

Exclusive

We decline more material than we accept, and more enquiries than we take on. Exclusivity here is not a velvet rope; it is the consequence of only handling what we can document, verify and stand behind when questioned.

05

Relationship-driven

We are paid on transactions and judged on decades. That asymmetry is the whole discipline of this business — it is why we will talk a client out of a stone, and why the people who sell through us have been doing so for years.

The position
Access is the asset. Everything else can be bought.
What a client gains

Three kinds of access

The reason a private house exists at all: the material that matters rarely reaches an open market, and when it does, it has already been seen by everyone.

01

Selected international opportunities

Material that surfaces through the network before it is offered, and in many cases before it is cut. Filtered by us first, so what reaches a client has already survived a refusal.

02

Exceptional assets

Natural diamonds of a calibre that appears rarely and disappears quickly, alongside coloured stones, important jewellery and precious metals held for the long term.

03

Private transactions

Conducted between two identified parties, documented in full, and recorded nowhere public. Neither the price nor the participants become part of a market history.

Contact

Access begins with an introduction.

Write to us and a principal of the house will answer personally. A meeting in person can always be arranged.

Administration

The book, and who may see it.

Issue invitation codes, and add or amend the stones on the books. Changes take effect immediately.

Access

Invitation codes

One code per client. Issue it directly, never publish it, and revoke it once a transaction closes.

Issued

Current codes

CodeIssued toStatus
New

Issue a code

Codes are generated in the format KA-XXXX-XXXX. Give the code verbally or in a direct message, never in a document that may be forwarded.

Collection

Stones on the books

Select a stone to amend it, or complete the form to add one. Photographs are managed separately.

Inventory

Current stones

RefStoneStatus
New entry

Add a stone

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On display

Stones on show.

The pieces currently on display. Drag a card to set the order, use Edit to change any detail or swap photographs, or take a stone off display.

Collection

Currently on display

Drag a card to reorder. Edit opens the full record, where you can change details and manage photographs.

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Further views and a 360° rotation film under controlled light are provided on enquiry.

The figures below are transcribed from the GIA report for this stone. The report itself, including its number, is released directly to you once an introduction is made, so that every line here can be checked against the laboratory’s own record.

GIA report
Released privately

The report and its number are sent to you directly once an introduction is made, so that you can verify the stone with the GIA yourself. We do not publish report numbers, because a published number exposes a stone's history — and its seller.

Value
On application

Discussed privately, following introduction and identity verification. We publish no prices.

Invoiced with a System of Warranties declaration confirming conflict-free origin. Viewing is arranged in Dubai following identity verification, in line with our anti-money-laundering obligations.