DIAMOND SEARCH EN We build strong relationships Why Windiam Why Windiam Our mission is to “Use our responsible sourcing practices, manufacturing skills, and niche expertise to build strong client relationships and help them achieve their full business potential.” We source and deliver an extensive selection of polished goods both to the world’s leading brands and jewellery chains, as well as smaller boutique shops. READ MORE Polished Polished 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. READ MORE Staying One Step Ahead Staying One Step Ahead We work daily with state of the art technology Meet the M-Screen 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. Optec Industries 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: Assorting your goods; every stone you receive from us is precisely as per specification Avoiding return shipments of rejected stones 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. Rough Rough Buying rough diamonds from a trustworthy company is essential to ensure you get the right stones, at the right price. We help you buy what you need. If you’re looking to sell, our valuation specialists will ensure appraisal of your stones with absolute integrity. We pride ourselves in guiding you through today’s global market confidently. You can count on us to serve as your trusted advisor from valuation through to sale. READ MORE Locations Keyboard shortcuts Map data ©2021 Google, INEGI Terms of Use Contact Locations Find your nearest office here Request an offer Find the perfect stone in our diamond search or click here to request an offer? Stay informed Subscribe for exclusive content ABOUT Why Windiam Our Commitment Career Our Catalog Disclaimer CONTACT Get in Touch Linkedin Locations Live chat SERVICES Monthly Specials Jewellery Services Diamonds as an Investment POLISHED Polished services Windiam 360 Staying one step ahead Meet Gon ROUGH Rough services Where we buy rough How we source & deliver Meet Alex HEAD OFFICE: Hoveniersstraat 53 Office 214 Diamond Exchange Building Box 18, Antwerp 2018, Belgium Phone +32 3 226 64 44 | Fax +32 3 226 62 00 | Email info@windiam.net Accreditations