House of diamonds · Switzerland · From the mine to the jewel
From our mine in Brazil, renowned for its coloured diamonds, to the workshops of the world's greatest cutters — WENGER serves the most demanding houses and collectors.
Know-how · From mine to adornment
The Mine · Brazil
We market our rough stones to a demanding international clientele, with complete traceability from extraction to delivery.
The Cutting
We cut our own stones and collaborate with renowned cutters around the world. Every facet is designed to reveal the brilliance, fire and value of each stone.
The Jewellery
We work with great houses that compose exclusive collections from our rarest diamonds — in the strictest confidence.
The House · The Founder
“A coloured diamond is not a stone like any other. It is an emotion that nature took millions of years to compose — our role is to reveal it.”
Our Expert - Gemmologist
The House · Switzerland
“Rarity cannot be improvised — it is handed down, from the mine to the jewel.”
The House · The Partners
Two partners, one requirement — excellence.
Partner · External Relations
Fabien Nappa has led his career in international relations, alongside high dignitaries. A career made of encounters, travels and human connections, where each mission opens the doors of a new cultural environment. Built over the years and across continents, this journey now opens new fields of opportunity and brings to this association privileged access to the rarest excellence.
Partner · Client Relations
Aram Wenger learned rigour in the field and ambition alongside the great, cultivating the art of listening and bespoke guidance. This journey, built stone by stone, has taken him from rough stones sold to traders to this association, which now allows them to have their gems cut by the finest artisans in the world, set in jewellery and coveted by the most demanding collectors.
Restricted access
Clients and partners of the House enjoy privileged access to our confidential platform: preview inventory, expertise reports and real-time quotations — in the strictest discretion.
Access by invitation · reserved for clients and partners
The privileges of the House
Available stones presented in preview, before any publication, with the option to reserve.
Independent gemmological reports, high-definition photographs and traceability history for every stone.
Prices and availability updated in real time, preferential terms and secure transactions.
Worldwide network
Geneva · Dubai · New York · Singapore
“Beyond our own production, a worldwide network of rough stones answers the most exclusive requests.”
Contact
Rough stones, bespoke cutting or an exclusive collection — every collaboration begins with a conversation. Our team replies with the utmost discretion.
contact@aw-diamonds.chThe Mine · Brazil
In the heart of Minas Gerais, our mine yields coloured diamonds of rare intensity — yellows, greens, pinks. Every stone is extracted, traced and certified, from the deposit to your case.
Responsible extraction · full traceability
On request · The categories
Every stone presented can be obtained on special request, sourced and certified by our gemmologists.
Private Area
This session is reserved for clients and partners of the WENGER House. Your credentials were provided to you personally.
Not a partner yet? Request access
Bespoke request
Every stone is sourced confidentially by our gemmologists. Describe your project — an advisor of the House will reply within 24 business hours.
Detailed specifications
Bespoke · from stone to setting
Watch, ring, earrings, necklace… describe your personalisation project — an advisor of the House will reply within 24 business hours.
