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DIAMOND AND JEWELLERY GRADING PROCESS

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1. Register and submit diamonds or jewellery
Your diamonds and jewellery will be in the best hands.
When buying diamonds and jewellery, it is in your best interest that they are graded impartially and objectively. At HRD Antwerp, we are committed to offering you transparency about your diamonds and jewellery.
REGISTER
2. Examination process
Each stone is thoroughly examined.
When submitted in our lab, your diamonds and jewellery will be thoroughly examined by our expert graders. All the diamonds in your jewellery undergo a thorough check to identify them to be natural, lab grown or imitation stones.
LAB POLICY
3. Issuing an HRD Antwerp Grading Report
You will receive a professional analysis.
The grading results of your diamonds and jewellery are printed on highly secure grading reports. Each report contains the grading results of your diamond, namely the 4Cs: carat, colour, clarity and cut. In addition to the 4Cs, our jewellery grading reports also enlist additional details, including the metal purity and setting style of your jewellery.
SECURITY FEATURES
4. My HRD Antwerp – Find your report
Track and trace your diamonds and jewellery.
My HRD Antwerp is a secure, 24/7 online service that provides global access to the HRD Antwerp grading report archive and transit results.
MY HRD ANTWERP

Did you know ?

HEARTS & ARROWS DIAMOND

Hearts & Arrows diamonds are precisely cut, round brilliants that, when examined using a special viewer, display eight hearts through the pavilion of the diamond and eight arrows through the crown of the diamond. The appearance of the pattern is a strong indicator of a top-quality cut.

HRD ANTWERP – EDUCATION

Polish Your Knowledge, Build Your Skills

HRD Antwerp, Europe’s prestigious academy of gemmology and diamond grading, offers you the comprehensive knowledge of diamonds and coloured stones you need to succeed in the jewellery industry. You will acquire both technical skills and practical expertise to evaluate gemstones. You will learn how to use the four evaluation factors, the 4Cs (colour, clarity, cut and carat weight), in full compliance with HRD Antwerp quality standards and using the technology that HRD Antwerp has developed and continues to develop.
With fifty years of experience, HRD Antwerp is the international reference for education and skills development in the diamond, gemstone and jewellery industry.

EXPLORE OUR COURSES AND BECOME AN ALUMNI AMBASSADOR

ONLINE LEARNING
CAMPUS LEARNING
DISCOVER ALL COURSES

POLISHED DIAMOND COURSES

Learn to grade diamonds in the diamond capital of the world. Our highly experienced instructors will guide you through the fascinating world of diamonds. Learn about the 4Cs and how they impact the value of a diamond. Get educated with our extensive practical sessions and become an expert.

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ROUGH DIAMOND COURSES

Learn how to sort rough diamonds into different categories according to various criteria such as size, colour, clarity and morphology. Our course provides a strong theoretical foundation that builds up towards practical experience. At the end of the course, you will be able to appraise rough diamonds.

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GEMMOLOGY COURSES

Identify, grade, and distinguish gemstones based on their physical and optical properties with hands-on training with gemmological equipment. Distinguish natural rubies, sapphires and emeralds from synthetic variants and simulants. Identify an extraordinary variety of coloured gemstones, based on their physical and optical properties, by learning identification methods and using gemmological equipment. Learn to distinguish natural rubies, sapphires, and emeralds from synthetic variants and simulants. Understand how gems are mined, fashioned and brought to the marketplace.

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JEWELLERY DESIGN COURSES

Translate your creative ideas into mesmerising jewellery designs using different illustration techniques. The HRD Antwerp design course covers unique digital techniques. Learn and use fundamental design concepts, including texture, shape, form, balance, negative space, colour and more. In addition, you will learn about the use of diamonds, gemstones and pearls in jewellery with different setting styles and create your mark in the world with your design portfolio.

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CUSTOM-MADE COURSES

Haven’t found what you were looking for? HRD Antwerp can also provide you with a tailor-made course. The content and location of the course can be adapted to your needs. We do this for schools, private individuals and companies.

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WORKSHOPS

Upskill your knowledge in specific areas of expertise with our curated workshops ranging from retail sales, fancy coloured diamonds, diamond treatments, laboratory grown diamonds, diamond spectroscopy, and the top 3 precious gemstones: ruby, sapphire, emerald.

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HRD ANTWERP EVENTS

ALL EVENTS
HRD DESIGN AWARDS 2022 – GRAND FINALE

HRD Antwerp – SUSTAINABILITY

We as HRD Antwerp are committed to set best-practice standard transparency and trust. This includes ecologically and socially responsible practices and a clear and scientific grading mechanism. We create consumer awareness through education and educational programs.
We are working hard on our ecological footprint. Furthermore, we want to contribute to lowering the ecological footprint of the entire supply chain.
More coming soon!

Meet Our Trusted Partners

    Point of Trust

    Customer satisfaction: our top priority

    We want to strive to exceed our customers’ expectations. This is why we have turned our
    customers into partners and ambassadors.

    By joining our Point of Trust Program/Centre of Excellence Programmes, they have access to
    countless advantages, including access to all HRD Antwerp innovations, lab services and
    education without forgetting our UpToDate research department.

    As we always seek to improve ourselves, we invite you, our partners, to keep on giving their
    feedback and comments. It is only with continual sharing that we can improve and thus
    better serve our customers, which is our main mission every day.

    DISCOVER MORE

    Centre of Excellence

    Partners in Education

    Our partners in education are located in Italy, Spain, Poland, Egypt, Saudi Arabia and The Philippines.
    We organize our diamond, gemmology and design courses on a regular basis with our partners. To know
    more about our course schedule, visit our education section.

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    Global Presence

    Headquartered in the City of Diamonds – Antwerp in Belgium, our company-owned laboratories are present in Antwerp, Dubai and Mumbai. Our representative and partner labs are present in Madrid, Surat, Türkiye, Egypt, and Saudi Arabia. Our education partners are present in Egypt, Saudi Arabia, Dubai, The Philippines, Türkiye, Italy and Spain.

    DISCOVER OUR COMPANY

    HRD Antwerp NV Antwerp

    Hoveniersstraat 22, 2018 Antwerp. Belgium.
    Tel.: +32 3 222 06 25 diamondlab@hrdantwerp.com

    HRD Antwerp Madrid Madrid

    Calle Siena 15 – 1C, 28027 Madrid. Spain.
    Heraclio Besada Tel: +34 917 000 935 heraclio.besada@hrdantwerp.com

    HRD Antwerp DMCC Dubai

    Office 6D, 6th Floor, Almas Tower, Jumeirah Lakes Towers, Dubai. United Arab Emirates.
    Tel: +971 4 585 7313 Info.dubai@hrdantwerp.com

    HRD Antwerp India Surat

    Surat Diamond Association Building, 2nd Floor, 12-14 Meera Nagar, Near Blood Bank, Varachha, Surat 395006. India.
    Tel: +91 261 255 6660 surat@hrdantwerp.com

    HRD Antwerp India Mumbai

    HRD Diamond Institute Pvt Ltd. Unit No.101 & 102, C/62, Vibgyor Tower, Bandra Kurla Complex, Bandra East, Mumbai 400 051. India.
    Tel: +91 22 4256 8000 sales.india@hrdantwerp.com clientinfomb@hrdantwerp.com

    Türkiye AYJ Laboratories Powered By HRD Antwerp

    Alemdar Mah. Ankara Cad. Vilayet Han, No: 8 Bölüm 6, 34110 Fatih, İstanbul. Türkiye
    info@ayjlabs.com

    Natural Diamond Grading Report

    An HRD Antwerp Natural Diamond Grading Report is an objective report that confirms a polished natural diamond’s authenticity and provides a detailed description of its key characteristics, the so- called 4Cs: Carat, Colour, Clarity and Cut.

    Price List

    Lab Standard Price

    Antwerp Lab
    India Lab
    Dubai Lab

    EXAMINATION

    When registered in our lab, your diamond or jewellery will be thoroughly examined by our graders and will undergo the following steps:

    WEIGHT

    SCREENING

    MEASUREMENT

    FLUORESCENCE

    COLOUR

    CLARITY

    CUT

    The weight of a diamond is expressed in carats. One carat equals 0.2 grams or 100 points, which indicates the size. HRD Antwerp has extremely accurate scales that measure up to five figures after the decimal point.

    The first step is to determine if your diamond is natural, laboratory-grown or treated. If a diamond does not pass the initial test, it will be directed to our research department to further determine its nature.

    Your diamond is accurately measured in millimetres as mentioned below: minimum diameter – maximum diameter in mm x height in mm (example: 6.44 – 6.47 mm x 4.04 mm)

    The fluorescence grade under long wave is mentioned in the report. For the “Natural Diamond Colour Grading Report” the fluorescence grade under short wave is also mentioned.

    Most diamonds range in colour from colourless (‘D’) to tinted colour (‘Z’). The colour grade is determined by comparison with a series of master stones, the best grade being D.

    All natural diamonds have traces of their growth history, which determines the diamond’s purity. In most gem-quality diamonds, these are minor internal characteristics or inclusions. The very best and rarest stones are graded ‘loupe clean’ or 'LC'.

    A diamond’s cut is essential to its beauty and is a combination of craftsmanship and scientific knowledge. The right proportions, symmetry and polish create internal reflections that maximise a stone’s sparkle, brilliance and fire.

    ADDITIONAL SERVICES

    Take advantage of our additional services to add value to your diamond. For more information and prices, please consult our price lists or contact our helpdesk via e-mail: diamondlab@hrdantwerp.com or +32 3 222 06 25

    HEARTS & ARROWS DIAMONDS

    LASER INSCRIPTION

    SEALING

    Hearts & Arrows diamonds are precisely cut round brilliants that, when examined using a special viewer, display eight hearts through the pavilion of the diamond (from below) and eight arrows through the crown of the diamond (from above). The appearance of the pattern is a strong indicator of a top-quality cut.

    o inscribe diamonds with lasers, HRD Antwerp uses high-quality excimer shortwave technology. It cannot be seen with the naked eye and consequently does not affect the diamond’s physical appearance or value. Laser inscription can either be used to match your diamond and its corresponding grading report or to customise your diamond with a personalised message or logo.

    Sealing guarantees that an issued grading report and the corresponding diamond belong together, and it keeps the diamond safe from oil and dirt. The HRD Antwerp sealing is tamper-proof.

    SEE ALL RESEARCH & SERVICES

    Laboratory Grown Diamond Grading Report

    Every diamond is tested to determine whether it is natural. If it is found to be laboratory grown, under disclosed conditions, we will issue a Laboratory Grown Diamond Grading Report, with this clear wording on the cover. The presence of the laser inscription is mentioned on the Grading Report, including a reference number and statement that the diamond has been laboratory grown. The same nomenclature as in a Natural Diamond Grading Report is used, with a detailed description of the 4Cs.

    Price List

    Lab Standard Price

    Antwerp Lab
    India Lab
    Dubai Lab

    EXAMINATION

    When registered in our lab, your diamond or jewellery will be thoroughly examined by our graders and will undergo the following steps:

    WEIGHT

    SCREENING

    The weight of a diamond is expressed in carats. One carat equals 0.2 grams or 100 points, which indicates the size. HRD Antwerp has extremely accurate scales that measure up to five figures after the decimal point.

    The first step is to determine if your diamond is natural, laboratory-grown or treated. If a diamond does not pass the initial test, it will be directed to our research department to further determine its nature.

    ADDITIONAL SERVICES

    Take advantage of our additional services to add value to your diamond. For more information and prices, please consult our price lists or contact our helpdesk via e-mail: diamondlab@hrdantwerp.com or +32 3 222 06 25

    SEE ALL RESEARCH & SERVICES

    Jewellery Report

    Our laboratory has the knowledge and instruments needed to thoroughly analyse your jewellery. An HRD Antwerp Jewellery Report is an official document in which a jewellery item is authenticated for different purposes, such as insurance, inheritance or purchase. It can also be used to determine the market value of a jewel. These reports provide a general description of the jewel, the diamonds it contains and the precious metals of which it is made.



    If you want to know more about our prices and services for jewellery certification, please fill in the form. Thank you!



     
     
     
     


    Price List

    Lab Standard Price

    EXAMINATION

    When registered in our lab, your diamond or jewellery will be thoroughly examined by our graders and will undergo the following steps:

    WEIGHT

    SCREENING

    The weight of a diamond is expressed in carats. One carat equals 0.2 grams or 100 points, which indicates the size. HRD Antwerp has extremely accurate scales that measure up to five figures after the decimal point.

    The first step is to determine if your diamond is natural, laboratory-grown or treated. If a diamond does not pass the initial test, it will be directed to our research department to further determine its nature.

    ADDITIONAL SERVICES

    Take advantage of our additional services to add value to your diamond. For more information and prices, please consult our price lists or contact our helpdesk via e-mail: diamondlab@hrdantwerp.com or +32 3 222 06 25

    SEE ALL RESEARCH & SERVICES

    Natural Diamond Colour Grading Report

    This grading report mentions the colour origin of your diamond and describes its colour characteristics, as well as its short- and long-wave luminescence.

    Price List

    Lab Standard Price

    Antwerp Lab

    EXAMINATION

    When registered in our lab, your diamond or jewellery will be thoroughly examined by our graders and will undergo the following steps:

    WEIGHT

    The weight of a diamond is expressed in carats. One carat equals 0.2 grams or 100 points, which indicates the size. HRD Antwerp has extremely accurate scales that measure up to five figures after the decimal point.

    ADDITIONAL SERVICES

    Take advantage of our additional services to add value to your diamond. For more information and prices, please consult our price lists or contact our helpdesk via e-mail: diamondlab@hrdantwerp.com or +32 3 222 06 25

    SEE ALL RESEARCH & SERVICES

    Natural Diamond Identification Report

    A special, pared-down grading report exclusively for diamonds under 1.00 ct.

    Price List

    Lab Standard Price

    Antwerp Lab
    India Lab
    Dubai Lab

    SEE ALL RESEARCH & SERVICES

    Laboratory Grown Diamond Jewellery Report

    Our laboratory has the knowledge and instruments needed to thoroughly analyse your jewellery.Every diamond of the jewellery piece is tested to determine whether it is natural or laboratory grown. If all diamonds set in the jewellery piece are found to be Laboratory Grown, under disclosed conditions, we will issue a Laboratory Grown Diamond Jewellery Report, with this clear wording on the cover. This report provides a general description of the jewellery, the laboratory grown diamonds it contains and the precious metals of which it is made.

     

    If you want to know more about our prices and services for jewellery certification, please fill in the form. Thank you!

     

     
     
     
     

     

    Price List

    Lab Standard Price

    SEE ALL RESEARCH & SERVICES

    Jewellery Report (Compact)

    A compact version of the jewellery report is available exclusively for jewellery containing less than 1.00 ct of diamonds (total weight)

    If you want to know more about our prices and services for jewellery certification, please fill in the form. Thank you!

     
     
     
     


    Price List

    Lab Standard Price

    SEE ALL RESEARCH & SERVICES

    Client Registration

    Submitting your diamonds or jewels

    Our online KYC client registration makes it easy for you to register as a client and submit your diamonds and jewels.