Diamond dealer

A diamond dealer is a professional specialising in diamonds, from evaluating and selecting individual stones to understanding their quality, cut and market value. The profession requires in-depth knowledge of diamonds, gemmology and the factors that determine the characteristics and value of each stone.

Since 1888, the De Hanssetters family has upheld a tradition of diamond expertise, combining gemmological knowledge, specialist craftsmanship and personalised guidance. At i-diamants, this expertise helps clients select certified diamonds, whether purchasing a loose stone or choosing the centrepiece for a bespoke piece of fine jewellery.

Diamond dealers since four generations in Antwerp, we created in 1999 the French website i-diamants.com. Each purchase or sale of diamonds is made in the respect of the rules of the know-how and the tradition of quality of Antwerp.

As the world center of diamonds for several centuries, Antwerp is the cradle of the know-how of our diamond trade. Diamonds, whether still rough or already cut, are a material whose quality and price are difficult to evaluate for the uninitiated. Understanding is the first step to making a good choice. The first role of a diamond dealer is to accompany you in your approach and help you choose the ideal diamond.

What Is a Diamond Dealer?

A diamond dealer is a professional specialising in the evaluation, selection, buying and selling of diamonds, whether rough or polished. Depending on their area of expertise, diamond professionals may work in trading, cutting, grading or sourcing exceptional stones for fine jewellery.

A diamond dealer's expertise is based on the ability to assess a stone's individual characteristics, particularly through the 4Cs of diamond quality: Carat Weight, Colour, Clarity and Cut. While these internationally recognised criteria provide a framework for evaluating diamonds, professional experience remains essential in assessing a stone's brilliance, proportions and overall appearance.

Diamond dealers also play an important advisory role. They guide clients through gemmological grading reports, help them compare different stones and assist them in choosing a diamond that suits their expectations, personal preferences and budget.

Beyond market value, the profession combines gemmological knowledge, a trained eye and an understanding of the diamond market to appreciate the distinctive qualities of each stone.

The diamond dealer's profession involves identifying, assessing, selecting and sourcing diamonds according to their gemmological characteristics and overall quality. Combining scientific knowledge, commercial expertise and fine jewellery traditions, this profession requires an in-depth understanding of gemstones and meticulous attention to detail.

Diamond Assessment and Evaluation

A diamond dealer examines each stone to assess its individual characteristics, including carat weight, colour, clarity, proportions, symmetry and polish. Using specialist instruments such as a jeweller's loupe and a gemmological microscope, they can identify inclusions and other features that influence a diamond's appearance and value.

Professional expertise also includes interpreting diamond grading reports issued by independent gemmological laboratories, including GIA, IGI and HRD Antwerp.

Diamond Selection and Trading

Another essential responsibility is sourcing and selecting diamonds on the international market. Diamond dealers compare stones based on their quality, availability and price, seeking the best balance between gemmological characteristics, visual appeal and budget.

This process requires a thorough understanding of the diamond market, together with an experienced eye for brilliance, light performance and harmonious proportions.

Personalised Guidance and Advice

Diamond dealers also advise clients throughout the selection process. Whether purchasing a loose diamond, choosing the centre stone for an engagement ring, or commissioning a bespoke piece of jewellery, their role is to explain the differences between stones and provide clear, personalised recommendations.

The profession therefore extends beyond buying and selling diamonds. It is fundamentally built on specialist knowledge, trust and the ability to help each client make an informed decision.

The professions of diamond dealer, gemmologist, lapidary and jeweller all belong to the world of precious gemstones, yet each involves distinct skills and expertise. From analysing a diamond to transforming it into a finished piece of jewellery, these specialists contribute at different stages of the process.

These professions naturally come together in the creation of exceptional jewellery. The diamond dealer selects the stone, the gemmologist provides scientific expertise, the cutter reveals its optical potential, and the jeweller creates the setting that enhances its beauty.

At i-diamants, the De Hanssetters family's diamond heritage reflects this connection between gemstone expertise, the selection of certified diamonds and French fine jewellery craftsmanship.

How Does a Diamond Expert Select a Diamond?

Selecting a diamond is one of the essential responsibilities of a diamond dealer. It requires extensive gemmological knowledge, careful observation and a thorough understanding of the diamond market. Each stone is assessed individually to determine its quality, beauty and value.

The 4Cs: The Fundamental Diamond Quality Criteria

Diamond professionals rely on four internationally recognised characteristics, known as the 4Cs of diamond quality:

• Carat Weight: Measures a diamond's weight. One carat equals 0.20 grams. Carat weight influences price but does not determine beauty on its own.
• Colour: For diamonds in the standard colourless-to-light-coloured range, grading generally extends from D (colourless) to Z (light yellow or brown).
• Clarity: Describes internal inclusions and external characteristics assessed under standardised magnification and viewing conditions.
• Cut: Includes factors such as proportions, symmetry and polish. Cut quality strongly influences how a diamond interacts with and reflects light.

These characteristics provide an essential foundation, but they must be considered together to understand the overall quality of a stone.

Beyond the 4Cs: The Diamond Expert's Eye

Two diamonds with similar carat weight, colour and clarity grades may display noticeable differences in brilliance and visual appearance.

An experienced diamond dealer therefore pays particular attention to cutting quality, light performance, proportions and the visual harmony of each stone.

Professional expertise goes beyond numerical grades, allowing the specialist to appreciate a diamond's individual character and aesthetic potential.

The Importance of Diamond Grading Reports

A diamond grading report is an essential document when selecting a diamond.

Issued by an independent gemmological laboratory such as GIA, IGI or HRD Antwerp, it describes the stone's principal characteristics according to the laboratory's grading procedures.

These reports help buyers compare diamonds using documented information and verify important details before purchasing.

However, a grading report does not replace a visual examination or the advice of an experienced diamond professional.

Finding the Right Balance Between Quality, Beauty and Budget

A diamond dealer's role is also to identify the best balance between a stone's characteristics, visual appeal and the client's budget.

Depending on the project, prioritising excellent cutting proportions, a particular colour grade or a slightly different carat weight may result in a more harmonious choice.

At i-diamants, this approach guides the selection of certified diamonds, whether purchased as loose stones or chosen as the centrepiece of an engagement ring or a bespoke fine jewellery creation.

Each diamond is unique, whether it is rough or cut. The diamonds we offer are all certified by one of the three largest gemological laboratories: HRD, IGI and GIA certificates. The certificate number is laser engraved on the diamond's circumference to ensure that the stone matches the certificate.

As diamond experts, our motto "Integrity Inside, Beauty Outside" underlines our attitude of respect for the customer and for the product:

1. Integrity of the maximum information on the diamond offered.

2. Optimal beauty of each diamond and in particular of the favorite diamonds of the selection of the selective catalog of i-diamants (selection carried out by a wise diamond dealer).

The look, the listening and the expertise of diamond dealers at your service.

The expertise of a diamond dealer naturally extends into the world of fine jewellery. Once a diamond has been selected for its gemmological qualities and brilliance, the jeweller's craftsmanship gives it a new dimension. Whether an engagement ring, solitaire, pendant or bespoke creation, each piece is designed to enhance the beauty of its centre stone.

At i-diamants, the De Hansetters family's diamond expertise is complemented by French fine jewellery craftsmanship, guiding each project from diamond selection to the finished piece.

Once you have chosen a diamond, we also offer you the possibility of creating a unique and custom-made piece of jewelry by our high jewelry workshop. Simply send us a sketch or photos and we will develop for you in 3D the jewel of your dreams, in gold or platinum according to your choice between these two precious metals. It will then be worked by hand by our diamond jewelers in Nice and Paris.

i-diamants is an online jeweler and not an online jeweler because we do not sell any brand of jewelry, but only jewelry made to measure for you, from the design to the final polishing, through the choice of gems (diamond and / or other gems and precious stones) and their setting by expert fingers. We offer you a collection of classic jewelry (solitaire, wedding rings, engagement rings, earrings, pendants...) to be customized according to the diamond and the size of your choice, as well as original creations and exceptional jewelry in gold and diamond.

As a specialist in made-to-measure jewelry, we will accompany you in the creation of a unique piece of jewelry created from scratch together, thanks to an exchange between your desires and our diamond and jewelry know-how. We have all the digital tools (3D technical drawings, photo renderings and 3D videos) so that you can make your modifications and your choice remotely by exchanging emails and can also receive you by appointment in Nice, Cannes and Monaco.

We work with the best experts and goldsmiths to create frames with finishes, settings and polishings worthy of the know-how of French high jewelry. Gold and platinum are the main precious metals we use for our ring, wedding band and diamond pendant creations. Our models, proposed mainly in all gold and diamond, can be set with other types of gems (sapphire, ruby, emerald or other precious stones and fine stones) on your request.

Choosing an experienced diamond dealer means benefiting from specialist expertise and personalised advice. Beyond the 4Cs and gemmological grading reports, professional knowledge helps assess each stone's brilliance, proportions and value for money.

At i-diamants, the De Hanssetters family's diamond heritage, dating back to 1888, is combined with a selection of certified diamonds and personalised guidance, helping you find the right stone for your expectations and budget.

We offer on our site a large stock and online price list of cut diamonds in all weights and qualities of color, clarity and cut, as well as a collection of the great classics of French jewelry and creative pieces.

Frequently Asked Questions About Diamond Dealers

What Is the Difference Between a Diamond Dealer and a Jeweller?

A diamond dealer specialises in evaluating, sourcing and trading diamonds, while a jeweller primarily focuses on making, selling or maintaining jewellery. Their skills often complement each other, particularly when creating an engagement ring.

How Can You Recognise a Trustworthy Diamond Dealer?

A reputable diamond dealer provides transparent information, explains diamond characteristics and helps clients compare different stones. Grading reports issued by recognised laboratories such as GIA, IGI or HRD Antwerp are also important considerations.

Can You Buy a Loose Diamond from a Diamond Dealer?

Yes. Diamond dealers offer loose diamonds that can be purchased separately from a jewellery setting. At i-diamants, clients can select a certified diamond independently, whether for a future jewellery creation or another personal project.

Can a Diamond Dealer Help You Choose an Engagement Ring?

Yes. A diamond dealer can help select a centre stone that suits your budget, preferred style and expectations. They may also work with a jeweller to create a setting that enhances the diamond's beauty.