Sell Your Diamond in Belgium

A Diamond Often Carries More Than Financial Value

Selling a diamond is not always a purely financial decision. It may be an engagement ring from a relationship that has ended, an inherited piece whose history is unclear or jewellery that has remained unworn for many years.

A professional selling process should therefore begin with information rather than pressure. You should understand what has been examined, which factors affect the offer and what will happen next before deciding whether to proceed.

Sothis Diamonds evaluates diamonds and diamond jewellery privately from its Antwerp location. The purpose of the first review is to establish what you have and determine whether a more detailed inspection is appropriate.

What Types of Diamonds and Jewellery Can You Submit?

You can request an initial valuation for loose diamonds as well as diamonds set in jewellery. There is no need to remove a stone from its setting before sending photographs or arranging an appointment.

Items submitted for consideration may include:

• Loose natural diamonds
• Diamond engagement rings
• Diamond wedding rings
• Diamond earrings
• Diamond pendants and necklaces
• Diamond bracelets and tennis bracelets
• Vintage and antique diamond jewellery
• Fancy-coloured diamonds
• Inherited jewellery containing one or more diamonds

If you are uncertain whether the stone is natural, laboratory-grown or another gemstone, explain what you know in the enquiry. Professional testing may be required before a meaningful offer can be considered.

How Is the Selling Value of a Diamond Determined?

No single piece of information can establish a reliable selling price. Even two diamonds with the same carat weight may have substantially different values because their quality, proportions, documentation, condition and buyer demand are different.

Carat Weight and Measurements

Carat describes weight, not visual size. A well-proportioned one-carat diamond may appear different from another one-carat stone with more weight hidden in its depth. Exact measurements therefore matter alongside the number printed on a grading report.

Colour and Clarity

Small differences in colour grade can influence demand and value. Clarity must also be examined carefully because the size, type and position of inclusions matter—not simply the letters shown on the report.

A dark inclusion beneath the centre of a diamond may affect desirability differently from a less noticeable inclusion close to the edge.

Cut, Shape and Proportions

Cut quality affects how effectively a diamond handles light. Shape also influences demand. Round, oval, emerald, cushion and other cuts do not necessarily trade at the same price even when their carat weight and broad quality grades are similar.

Natural or Laboratory-Grown Origin

Natural and laboratory-grown diamonds are different market categories. Their origin must be correctly identified before a meaningful valuation can be provided. Visual appearance alone is not a reliable way for an owner to determine origin.

Grading Report

A GIA, IGI or HRD Antwerp report can help confirm important characteristics and make the initial review more precise. However, a grading report describes a diamond; it does not state exactly what a buyer must pay.

Jewellery Setting and Precious Metal

When a diamond is mounted in a ring, pendant, bracelet or pair of earrings, the setting must also be considered. Metal type, weight, workmanship, condition and additional gemstones may contribute to the overall offer.

Current Buyer Demand

Diamond prices are not permanently fixed. Current demand, availability, shape, size, certification, visual appearance and the ease with which a diamond can be matched to a future buyer all influence its resale market.

Example: Why Two One-Carat Diamonds May Receive Different Offers

Consider two round diamonds that both weigh 1.00 carat.

The first has a verifiable grading report, a high colour grade, eye-clean clarity and strong cut proportions. The second has a lower colour grade, visible inclusions, less desirable proportions and no recent documentation.

Although both diamonds are described as “one carat,” they should not be expected to receive the same valuation. Carat weight is only one part of the assessment.

This is also why an accurate offer should not be calculated from a photograph alone. Photographs can support an initial review, but they cannot reliably confirm every inclusion, proportion, treatment or grading characteristic.

This is an illustrative example, not a Sothis Diamonds customer case study.

Insurance Value, Retail Price and Resale Value Are Not the Same

One of the most common surprises for sellers is discovering that an old appraisal or original receipt does not equal the amount a diamond can be sold for today.

Type of Value	What It Represents	Is It a Realistic Selling Price?
Original retail price	The amount paid when the diamond or jewellery was purchased	Usually not
Current retail price	The advertised price of a comparable new item	Not necessarily
Insurance value	The estimated cost of replacing a comparable item through a retail channel	No
Professional purchase offer	What a buyer is prepared to pay after considering the item, demand, risk and resale costs	Usually the most relevant figure

For example, an insurance document may give a ring a replacement value of €10,000. That does not mean a professional buyer can resell the same pre-owned ring for €10,000 or offer that amount to its owner.

A transparent buyer should explain this difference rather than using the higher insurance figure to create unrealistic expectations.

How the Sothis Diamond-Selling Process Works

1. Send the Available Information

Complete the valuation enquiry with a short description of the item. Include the approximate carat weight if known and upload clear photographs of the front, side and back of the jewellery.

If you have a GIA, IGI or HRD Antwerp report, include a photograph or PDF. You may also submit an old receipt or appraisal as supporting information.

2. Receive an Initial Expert Review

The available information is reviewed to determine the likely item type, whether sufficient details are present and whether a physical inspection should be arranged.

Any estimate based only on photographs and documents remains preliminary. The diamond’s characteristics and condition must be confirmed before a final offer is made.

3. Arrange an Appointment or Secure Shipment

Depending on your location, you may arrange to present the diamond at the Antwerp office or discuss insured shipping with the Sothis team.

Do not send valuable jewellery through ordinary untracked post. Shipping instructions and insurance arrangements should be confirmed before dispatch.

4. Physical Inspection and Verification

The diamond and its documentation are checked in person. This may include confirming weight, measurements, colour, clarity, cut characteristics, fluorescence, condition and natural or laboratory-grown origin.

5. Receive a Final, No-Obligation Offer

Once the inspection is complete, you receive a final market-based offer. The offer should be clear, with no requirement to accept it immediately.

6. Accept the Offer and Receive Payment

If you choose to proceed, the transaction and payment are completed through the agreed secure method. If you decline, return or collection of the item is arranged according to the agreed procedure.

Can You Sell a Diamond Without Its Certificate?

Missing paperwork does not necessarily mean the diamond has no value. Older and inherited jewellery is frequently separated from its original receipt, appraisal or grading report.

Send the information you do have and explain that the report is missing. Sothis Diamonds can advise whether the item should proceed to physical inspection and whether further testing or documentation may be useful.

Do not automatically pay to have a diamond certified before speaking with a buyer. For a small or lower-value stone, the cost and waiting time may not improve the final result. For a larger or unusual diamond, updated laboratory documentation may be more useful.

Illustrative Seller Scenario: An Inherited Ring with No Paperwork

Imagine inheriting an older ring with no receipt and no grading report. A family member remembers that it contains a diamond, but no one knows its weight or quality.

The seller begins by photographing the ring in natural light, including its side profile and any visible metal hallmarks. The photographs allow an initial conversation to begin, but they do not prove the stone’s identity or grade.

During physical inspection, the centre stone, setting and precious metal can be assessed separately. Only then can a market-based offer be prepared.

The absence of paperwork should lead to verification—not guesswork and not an automatic assumption that the piece is worthless.

This scenario is illustrative and should not be presented as an actual customer transaction.

Why Sell a Diamond Through Antwerp?

Antwerp has been connected to the international diamond trade for centuries and remains an active centre for diamond expertise, identification, certification and trading.

Access to Antwerp does not guarantee that every diamond will receive a high offer. It does mean the item can be considered within an established professional diamond market.

Sothis Diamonds is located at:

Hoveniersstraat 2, Bus 210
2018 Antwerp, Belgium

Appointments should be confirmed before travelling with valuable jewellery.

A Private and Secure Way to Request a Valuation

You should not have to share your complete personal history simply to learn whether a diamond is suitable for valuation.

The first enquiry should contain only the information required to understand the item and contact you. More detailed identity, address or payment information can be collected later when necessary for an appointment, shipment or completed transaction.

If shipping is required, confirm the approved courier, tracking, packaging and insurance arrangements directly with Sothis Diamonds before sending the item. Keep photographs of the jewellery, grading report, parcel and shipping receipt.

How to Prepare Your Diamond for Valuation

There is no need to aggressively clean, polish or alter the jewellery before submitting it. Gentle removal of surface dust may make photographs clearer, but strong chemicals or improvised tools can damage the metal or loosen a setting.

Photograph the item against a plain background in indirect daylight. Include:

• One complete front view
• One side view showing the setting
• One image of the back or underside
• Close-ups of visible hallmarks or engravings
• Both sides of the grading report, if available

Do not try to remove the diamond from its setting. This should only be considered by a suitably qualified professional when necessary for accurate testing or weighing.

Frequently Asked Questions

How much can I sell my diamond for?

The potential selling price depends on whether the diamond is natural or laboratory-grown, its carat weight, colour, clarity, cut, shape, condition, grading report and current market demand. A physical inspection is normally required before a final offer can be confirmed.

Is the initial diamond valuation free?

The initial review is offered without an obligation to sell. Any additional laboratory service that may involve a separate cost should be discussed and approved before it is arranged.

Do I need a GIA, IGI or HRD report?

A recognised grading report can make the review more precise, but you may still submit an enquiry if the report has been lost or was never issued.

Can I sell a diamond ring without removing the stone?

Yes. A ring can initially be submitted and examined with the diamond in its setting. Do not attempt to remove the stone yourself.

Can I sell inherited diamond jewellery?

Inherited rings, earrings, necklaces, bracelets and loose stones can be submitted for consideration. Include any paperwork found with the jewellery, but do not assume an older appraisal represents its present resale value.

Can the final value be confirmed from photographs?

Photographs may support an initial review, but they cannot reliably confirm every characteristic. A final offer should normally follow physical inspection and verification.

Can I visit Sothis Diamonds in Antwerp?

Sothis Diamonds is located in Antwerp’s diamond district. Contact the team before visiting so that an appointment and secure handling of the item can be arranged.

Is shipping my diamond safe?

Only use the courier, packaging, tracking and insurance procedure agreed with Sothis Diamonds. Valuable jewellery should never be sent through ordinary untracked post.

Am I required to accept the offer?

No. A no-obligation offer gives you the information needed to make your own decision.

What if I do not know whether my diamond is natural?

Submit the details available and state that the origin is unknown. Professional testing may be necessary before an offer can be made.

Request Your Free Diamond Valuation

A diamond may have been purchased years ago, inherited without paperwork or kept because deciding what to do with it felt difficult. The first step does not commit you to selling. It simply gives you clearer information about what you own and whether there is a suitable market for it.

Send photographs and any available documentation to begin a private initial review with Sothis Diamonds.