One Stone.One Piece. One Story.
Bespoke jewelry designed and hand-executed around a single exceptional natural gemstone or diamond. From engagement ring to a lifetime cabinet — every commission is a one-of-one dialogue between the wearer, the stone and the maker.
- One-of-one design
- Master goldsmiths · in-house
- Certified natural gemstones only
- Discreet worldwide delivery
We do not start with a drawing. We start with the stone.
A bespoke piece from SOSNA is a calm, guided process — not a technical brief. You bring the occasion; we bring the stone, the sketch and the craftsmen. Most commissions complete in three unhurried exchanges.
The final form of the jewel always follows the stone — its structure, proportions and natural character. The design adapts to what is already there, rather than to a predetermined idea.
- IThe stone leads — everything else adapts to it.
- IIRestraint over ornament — proportion is the finish.
- IIIExecuted by hand, in one house — no white-labelled workshops.
- IVBuilt to be worn every day and to outlast a lifetime.
A quiet workshop, measured by commissions — not campaigns.
A workshop sized to the mandates we accept. Every figure below is verifiable on request under NDA.
- 8–14wTypical timelineFrom confirmed design to hand-over
- 4House desksPrague · Miami (FL) · Dubai DMCC · Bangkok JVC
- 5Tier-1 laboratoriesGIA · SSEF · Gübelin · IGI · HRD
- 1Named principalSame person, first message to final case
Timelines reflect standard commissions. Rush work for anniversaries and proposals can be discussed — raise the deadline in your first message.
The stone is the beginning — the jewel is what follows.
Some clients arrive with a stone already chosen. Others select one with us during the process. Many begin with only an occasion, a wearer and a feeling. In every case the stone becomes the starting point for a piece shaped in direct, private conversation.
Many of the gemstones and diamonds we present as loose stones can be commissioned as bespoke jewels around them. We can also source a stone to a defined brief — origin, colour, weight, certification — through our Private Sourcing desk.
Your stone
Reset a family stone, a vintage piece or a stone already in your possession. Fresh laboratory report where useful; full incoming documentation.
Our cabinet
Choose from certified natural gemstones and diamonds already curated by the house — origin-reported, treatment-disclosed, ready to commission.
Sourced to brief
For a specific colour, origin or weight not currently in cabinet — a written brief opens a Private Sourcing mandate handled by the same principal.
One name is responsible for every stone and every jewel that leaves the atelier.
The atelier is led by a single principal responsible for every commission accepted — from first conversation, through stone selection, sketch and setting, to the final personal hand-over. No sub-agents. No white-labelled workshops. No anonymous intermediaries.
A decade and a half between the coloured-stone counters of Bangkok's JVC, the trading floors of Dubai's DMCC and the US wholesale market out of Florida shaped an approach that is deliberately narrow: fewer pieces, fully documented, fully owned.
- GIA-trained gemmologist
- ICA member — International Coloured Gemstone Association
- Master goldsmith network — in-house team since 2011
- Insured, bonded and audit-ready operations
Four unhurried steps from vision to heirloom.
A bespoke commission unfolds over four acts. From the first message to the final case, you have one dedicated advisor — the same person, throughout.
- I
Private Consultation
A confidential conversation — in person, by video or in writing. We listen to the occasion, the wearer, the reference images, the metals you love and the stones that move you.
- II
Design & Stone Selection
Hand-drawn sketches, gouache colour renderings and 3D previews around your chosen stone. A curated selection of certified natural gemstones matched to your brief — origin, cut, character. Fully itemized offer before we begin.
- III
Atelier Craftsmanship
Master goldsmiths forge, cast, set and finish the piece by hand in platinum or 18k gold. Every stage is documented; you receive progress photographs at agreed milestones.
- IV
Personal Hand-Over
The finished piece is delivered in person or by insured private courier — with the full laboratory report, the SOSNA house certificate and a written statement of provenance.
“Ten pieces a year, chosen over a hundred that pass a lesser bar.”
Recent one-of-one realizations.
A quiet selection of pieces recently completed for private clients. Names withheld; every design and stone is unique and no longer available.
Engagement commission — Munich
The Colombian Chapter
3.42 ct Colombian emerald · platinum · tapered baguettes
Anniversary commission — Zürich
Rose Duet
Pair of 2.1 ct pink sapphires · 18k yellow gold · pavé halo
Heirloom commission — private client
Kashmir Halo
4.87 ct oval Kashmir sapphire · platinum · diamond halo
Drawn, forged and set — by the same hands.
Every SOSNA commission is executed by a small team of master goldsmiths and setters we have worked with for more than a decade. No third-party workshops, no anonymous subcontractors.
The result is a piece with a single visual signature: quiet proportions, precise settings, and a stone that always keeps the last word.
In-house design
Sketch to CAD in one studio.
Master setters
Micro-pavé, invisible & handmade prong work.
Only natural stones
No lab-grown, no synthesis — ever.
Full traceability
Photo dossier at every stage of production.
One atelier. Four accountable desks.
The Prague atelier is the heart of every commission. Three trade desks extend our reach and let us handle stones, memo and hand-carry across the markets we actually cover.
- 01
Prague
Atelier · Europe HQWhere every commission is designed, forged and finished. Client hand-over by appointment.
- 02
Miami (FL)
US wholesale deskUS-facing desk for vetted trade counterparties, memo, W-9 handling and hand-carry across the US calendar.
- 03
Dubai DMCC
Gulf & Asia treatyDMCC-registered desk for Gulf and greater Asia — bonded, tax-free logistics.
- 04
Bangkok JVC
Coloured-stone lapidaryJewelry Trade Center — direct sapphire, ruby and spinel cutter relationships for bespoke sourcing.
Built for the United States private and wholesale market.
A dedicated US desk based in Florida for private US clients and vetted trade counterparties — retailers, designers, ateliers and appraisers. Terms familiar to the American trade, execution familiar to the European maison.
- Miami (base)
- JCK Las Vegas
- AGTA Tucson
- Couture
US Wholesale is a trade-only channel. Retail collectors are served through the Private Advisor from the same desk.
- I
Florida base
US desk seated in Florida (Miami metro). Same-day domestic dispatch and secure client meetings by appointment.
- II
Memo terms
Consignment memo to vetted trade counterparties on a per-piece basis. Standard 7–14 day windows, extendable by written agreement.
- III
Hand-carry
Insured hand-carry across the US trade calendar — travel to client cities on defined show weeks and by appointment.
- IV
Documentation
W-9 / resale certificate accepted. Full commercial invoice, laboratory report and provenance file with every piece.
Metals and stones we work with.
We work exclusively with responsibly sourced precious metals and certified natural gemstones and diamonds. Anything not listed here can be discussed on request.
Metals
- Platinum 950Cool white — our preference for coloured centre stones and diamonds.
- 18k white goldRhodium-finished or natural warm white.
- 18k yellow goldWarm champagne palette — the house signature.
- 18k rose goldSoft pink undertone for feminine commissions.
Gemstones
- EmeraldColombia · Zambia · Ethiopia
- SapphireKashmir · Ceylon · Madagascar · Montana
- RubyBurma · Mozambique · Madagascar
- Spinel · Paraíba · Alexandrite · Tanzaniteand other rare collector stones on request
- Natural diamondsGIA-certified · type IIa on request
Transparent by structure, discreet by delivery.
A bespoke quote is built openly. You always see what you are paying for — the stone, the metal at day rate, the design and workshop hours, and any certifications. Nothing implied.
SOSNA Diamonds is not a financial adviser. Jewelry is offered as an object of beauty and craftsmanship, not as an investment product with guaranteed return.
Where the atelier is known.
A short list of channels where our work, our people or our stones have been referenced. We do not chase press — we do not decline it either.
- Rapaport
- JCK Magazine
- National Jeweler
- GemGuide
- The Jewellery Editor
- ICA — International Coloured Gemstone Association
- AGTA — American Gem Trade Association
- RapNet authorised member
- Responsible Jewellery Council — application in progress
Logos and citations are added only once written permission is on file. Placeholders shown pending confirmation.
Bespoke commissions, in plain language.
How long does a bespoke commission take?
Typically 8–14 weeks from confirmed design and stone selection to hand-over. Rush commissions can be discussed for anniversaries and proposals — please raise the deadline in your first message.
Do I need my own stone?
Not at all. Our house cabinet holds hundreds of certified natural gemstones and diamonds — we help you choose one that fits the piece, the budget and the occasion. If you have your own stone, we work around it.
Can I bring a family heirloom to be reset?
Yes. We regularly reset family stones and vintage pieces. We document the incoming stone, provide a fresh laboratory report if useful, and design around it with your input.
How is the price structured?
A bespoke quote combines the certified stone, the metal weight at day rate, the design and workshop hours, and any certifications. You receive a fully itemized offer before we begin — see Fees & Terms above.
Do you ship internationally?
Yes — worldwide, by insured private courier. Customs, duties and documentation are handled by our team for the United States, EU, UK, Switzerland, Canada and the UAE as standard.
Can US retailers or designers commission through the US desk?
Yes. The Miami desk handles US wholesale on memo terms, W-9 and resale certificates. Trade counterparties receive net wholesale pricing and can hand-carry pieces across US industry weeks.
Do you offer lab-grown or synthetic stones as an alternative?
No — and this is not a matter of price. SOSNA Diamonds trades exclusively in natural, certified gemstones and diamonds. This is a permanent house standard.
Tell us about the piece you have in mind.
Share as much or as little as you like. Your advisor will reply personally within one business day — no automated funnels, no follow-up campaigns.
- General inquiriesexchange@sosnagems.com
- Corporate officeoffice@sosnagems.com
- Telephone (US)+1 (727) 383-6970
- Telephone (EU)+420 242 488 299
SOSNA Diamonds trades exclusively in natural, certified gemstones and diamonds. No lab-grown or synthesized stones — ever. Jewelry is offered as an object of beauty and craftsmanship, not as a financial instrument.