Gemstones and diamonds — origin, certification and expert selection.
Natural gemstones and certified natural diamonds — no synthetics.
GIA · IGI · HRD · SSEF · Gübelin.
Every treatment is documented and disclosed.
Discreet delivery, fully insured worldwide.
Confidential terms for vetted trade partners.
Selected by origin, structure and untreated character.
Emeralds, sapphires, rubies and rare varieties — each admitted to the cabinet on the same standard. Independent laboratory reports, verified provenance, no cosmetic compromise.
A short, rotating selection from the house cabinet. Each stone is examined in person and accompanied by an independent laboratory report.
SG·EM·2407
SG·RB·2411
SG·SA·2418Diamonds
Hand-picked white diamonds with independent laboratory reports. Evaluated for more than appearance alone.
Jewelry built around the stone, not around a catalogue. One-of-one commissions, developed privately with the house atelier.
For clients seeking a specific origin, colour, cut, weight or certified stone — sourced confidentially from primary cutters, auction houses and private estates worldwide.
Each SOSNA Diamonds piece is designed around a single curated stone. The jewel is the form — the stone is what endures.
A small number of one-of-one commissions are currently being finished in the atelier. Each may be reserved for a private viewing before completion.
Aquamarine & Diamond Ring
Ruby & Diamond Ring
Tsavorite & Diamond Ring
Commission a piece around your own stone.
Begin a Bespoke Commission ↗
By appointment. In person, by encrypted call, or in writing.
Every inquiry is handled personally by a senior member of the house — never a sales desk. We advise on characteristics, provenance, laboratory reports, comparable market context and next steps, always in strict confidence.
GIA-trained specialist assigned to your inquiry from first contact to delivery.
Encrypted correspondence, private viewing rooms in Miami, Dubai and Bangkok.
A shortlist of stones matched to your brief — origin, character, certification, budget.
Personal reply within 24 hours · Monday–Friday
SOSNA Diamonds does not present natural gemstones or diamonds as financial investments.
For established clients diversifying beyond gemstones, we occasionally source LBMA Good Delivery gold. Bars from 100 g upwards and recognized bullion coins from one troy ounce. Sourced by request, delivered with full assay documentation and insured logistics.
Gold is a complement to our gemstone practice, not our principal trade. We are not financial advisers and do not guarantee returns.
SOSNA Diamonds operates from the three trading centers that define the modern gemstone market — from direct sourcing in Southeast Asia, through the regulated free-zone gateway of the Middle East, to private client representation in the United States.
Private Client Representation
Client-facing hub for North American collectors, family offices and private buyers. Discreet viewings, insured logistics and documentation handover on U.S. soil.
DMCC Free Zone — Gemstone Trade Desk
Middle East trading desk within the DMCC, the world's largest regulated free-zone for precious stones. Fully documented cross-border trade and vaulted custody.
JTC — Sourcing & Cutting Access
Direct sourcing presence at the Jewelry Trade Center — the epicenter of colored-stone supply, master cutting and pre-market access before stones reach the West.
Independent laboratory reports (GIA · IGI · HRD · SSEF · Gübelin) accompany every stone — detailed further below.
