Buy Certified Loose Diamonds
Browse our curated collection of GIA, HRD and IGI certified loose diamonds — sourced directly from the heart of Antwerp's diamond district. From the classic round brilliant to the elegant emerald cut, every stone is certified and ready to ship.
Up to 75% Below Retail
Insured Next-Day Shipping
Why Diamantwerp
Why Buy Certified Loose Diamonds from Antwerp?
Up to 75% Cheaper
GIA, HRD & IGI Certified
Every diamond in our collection carries a certificate from GIA, HRD Antwerp or IGI — the world's three most respected grading laboratories.
Ethically Sourced since 1987
Full Kimberley Process compliance. Conflict-free, responsibly sourced natural diamonds — backed by three generations of integrity.
Based at Pelikaanstraat 62, in the very heart of the Antwerp diamond district, Diamantwerp has supplied certified loose natural diamonds to private buyers and professional jewellers since 1987. As a direct dealer, we offer our full collection at prices significantly below retail — with the same internationally recognised certifications. Whether you are looking for an investment-grade stone or the perfect diamond for an engagement ring, our team provides personal expert guidance at every step. Learn more about our story.
Our collection
Explore All Diamond Shapes
Every shape certified by GIA, HRD or IGI — sourced directly from Antwerp's diamond district.
Round Brilliant
Most Popular
The classic choice with maximum brilliance. 58 facets engineered for unmatched sparkle and fire.
Oval
Trending
Elongated brilliance that flatters the finger. Appears larger than a round of equal carat weight.
Cushion
Vintage Romance
Soft rounded corners with a pillow-like shape. Broad facets showcase mesmerising light play.
Princess
Modern Classic
A square silhouette with brilliant-style faceting. Sharp corners and contemporary sparkle.
Emerald
Art Deco
Step-cut facets create a hall-of-mirrors effect. Prized for its understated, architectural elegance.
Pear
Distinctive
A teardrop silhouette combining the round's brilliance with the marquise's elongation.
Marquise
Maximum Presence
The largest face-up area of any shape. Elongated points create a dramatic, regal look.
Radiant
Bold Sparkle
Cropped corners with brilliant-cut faceting. Combines the emerald's shape with fire and brilliance.
Asscher
Architectural
A square step-cut with deep pavilion facets. Art Deco heritage with a distinctive windmill pattern.
Heart
Timeless elegance
The ultimate symbol of love. A modified brilliant with a distinctive cleft and symmetrical lobes.
Diamond education
How to Choose Your Perfect Diamond
Selecting a certified loose diamond is a personal journey. Every stone is unique, and the right choice depends on a balance of the four fundamental quality factors — known as the 4 C's of diamond
Use our search tool above to filter by cut, colour, clarity and carat weight. Compare certificates, review 360° imagery, and find the stone that matches your taste and budget. Not sure where to start? Our experts are here to help.
COMMON Questions
Frequently Asked Questions
Everything you need to know about buying certified loose diamonds.
Are all your diamonds certified?
Yes — every diamond in our collection is independently certified by GIA (Gemological Institute of America), HRD Antwerp, or IGI (International Gemological Institute). These are the three most respected and internationally recognised diamond grading laboratories. Each certificate provides an objective assessment of the diamond's cut, colour, clarity and carat weight.
How much cheaper are your diamonds compared to retail?
Our certified loose diamonds are typically up to 75% cheaper than high-street jewellers (and even more). As a direct dealer in the Antwerp diamond district, we source our stones without middlemen and pass the savings directly to you. Every diamond is priced transparently — what you see is what you pay, with no hidden charges.
Do you ship internationally?
Yes — we offer fully insured next-day shipping within Belgium and the European Union. Worldwide shipping is available on request. Every shipment is discreetly packaged and fully insured for its total value. Contact us for international delivery details.
Can I visit your showroom in Antwerp?
Absolutely. We welcome visitors at our office at Pelikaanstraat 62, 2018 Antwerp, in the heart of the diamond district. We are open Monday to Friday, 09:00–17:00. We recommend scheduling an appointment so we can give you our full, personalised attention.
What is the difference between natural and lab-grown diamonds?
We exclusively sell natural diamonds. Natural diamonds are formed over billions of years deep within the Earth, making each stone truly unique. Lab-grown diamonds are manufactured in a factory and lack the rarity and long-term value of natural stones. All our diamonds come with independent certificates confirming their natural origin.
How do I choose the right diamond?
Start by understanding the 4 C's — cut, colour, clarity and carat. Use our filter tool to narrow your search by the criteria that matter most to you. If you are unsure, our team is happy to provide free, no-obligation expert advice. Get in touch and we will help you find the perfect stone for your budget and occasion.
