We deliver your perfect polished stone on time and at the right price. From in-house sorting to express delivery, we use our global network to negotiate the most competitive prices for you. From this, we command a reliable reputation, as a trusted partner with a flawless record.
We sell more than just premium stones. By choosing Windiam, we help you to buy with our expert knowledge cultivated over three generations of diamond trading. Our expertise helps you thrive in a changing marketplace to ensure your business profits
Our stock is updated in real-time, so you’ll always know what we have. While many our stones are HRD and GIA certified; we can source nearly any kind of polished diamond you wish for.
We are your specialist wholesalers in Baguette diamonds for watch and jewellery manufacturing.
Whether you need large white stones or natural fancy coloured diamonds; we have the capability to manufacture them.
In today’s ultracompetitive market, you need your partner to deliver premium diamonds in the shortest lead time possible. Our global logistics partners (and sometimes even us!) deliver your diamonds when you need them.
Our influential network connects to the best gemologists, artisans and manufacturers of the major world cities. If you need a specific advice or service, we’ll match you with the person or company you need. We nurture our network for your business growth
Call us to find out more about our polished services here
Increased competition makes it tough to meet your customer’s demands.nWe solve this by training our sourcing specialists to understand, assess and fully meet your requirements. Our meticulous QC department uses Sortoscopes to ensure a minimum rejection of goods. And our global network gives us the edge to supply your customers with what they desire promptly.
Our rough sourcing, polished expertise and optimised production experience meet your customer’s desires in our typically valued manner. When large and expensive stones are required, we’ll allocate rough stones to meet your specific demands.
Windiam understands the more diamonds your customers can inspect before purchasing the more your sales increase. That’s why we’ll loan you the premium diamonds you want on credit, interest-free.
If you have an unsatisfied customer and need to buy back a stone, we’ll offer you financial support as and when required.
‘Cut in Antwerp’ is synonymous with perfection and over 500 years of master craftsmanship. Our Antwerp-based headquarters gives us access to the best polishers in the world. Optimising your customer’s gems regularly provides a lifetime of happiness.
Tours of the diamond market improve your understanding of how the top traders operate. Technical training in diamond sorting including the correct use of an eye loupe and Sortoscope. Applying this product knowledge back home will help you stand out in today’s ultra-competitive business.
Presenting your collections externally (e.g. trunk shows) is an excellent way to build your brand. We’ll support you by taking your event to the next level with one of our representatives and a premium stones collection
We can provide you with certified diamonds. Sealed or laser inscribed from the distinguished Hoge Raad voor Diamant (HRD) or Gemological Institute of America (GIA) laboratories
Call our Antwerp head office to find out how our 360 program can benefit your business.
We work daily with state of the art technology
A precise, automated melee device that screens round brilliant diamonds from 1.0 millimeter till 20 points for possible lab grown ones, or potential HPHT colour enhancement and simulants.
The technology eliminates the risk of receiving compromised goods
This French company have developed an automated optical dimensional control system for round melees diamonds. With its precise cut quality control, it delivers on your specific measurements
As a preferred partner for many luxury watches and jewellery houses, we save you time and money by:
Both machines have been in operation since 2016 at our Antwerp headquarters. Alongside our in-house sorting team, these investments help optimise your search for the perfect diamonds.
Ask us more or arrange a tour of our technology by calling our Antwerp head office here.
Gon Raz is a 3rd generation diamantaire bringing the heritage and impeccable reputation of his grandfather Dov and father Amos Raz who were among the founders of the Israeli Diamond Exchange
To speak to Christopher Mix, contact our Antwerp head office here
