Question 1

Are lab-grown diamonds real diamonds?

Accepted Answer

Yes. They are crystallised carbon with the same chemical, physical and optical properties as mined diamonds, graded on the same 4C criteria.

Question 2

Who certifies your stones?

Accepted Answer

Every diamond is D or E colour, VS or VVS clarity, independently IGI certified, and accompanied by its certificate.

Question 3

Can I order a size that is not listed?

Accepted Answer

Yes. Most pieces can be made to your size. Write to us and we will confirm the timeline before production begins.

Question 4

How long does a bespoke commission take?

Accepted Answer

Approximately one month from your first enquiry — consultation, stone selection and approved design, then confirmation and payment, hand-setting in the atelier and insured delivery.

Question 5

Do you offer appointments in Antwerp?

Accepted Answer

Appointments at the atelier are by request, Monday to Friday. Video consultations are available worldwide.

Question 6

The finest quality, at the fairest price

Accepted Answer

We work directly within the Antwerp diamond trade and sell only certified lab-grown diamonds, which allows us to offer the quality of a great house at a considerably fairer price. Every piece is entirely handmade in our Antwerp atelier.

Question 7

The ONE ANTWERP Promise

Accepted Answer

Should you find an identical piece at a lower price from a jeweller in the European Union, we will refund you the difference. Identical means the same carat weight, cut, colour, clarity, IGI certification, gold and setting, publicly offered by an established jeweller within the European Union. Simply send us the offer within fifteen days of your purchase; once verified, we refund the difference with pleasure. Bespoke creations, the Monaco Edition, pieces priced on request and The One & Only Collection are excluded.

Question 8

Made-to-measure engagement and eternity rings

Accepted Answer

Engagement rings and eternity rings are made to measure for you in Antwerp. Production takes between fifteen days and one month. Because each ring is created to your own measurements, made-to-measure pieces are not returnable or refundable.

Question 9

Insured worldwide delivery

Accepted Answer

Every order ships by DHL Express with signature required, at a flat rate of €65 worldwide. This secure service is mandatory because the jewellery is insured for its full actual value throughout transit. For deliveries outside the European Union, your country’s customs may apply import duties or local taxes, which are set by and remain the responsibility of the recipient. We are always happy to help you estimate them before you order — simply write to us.

Question 10

Delivery times

Accepted Answer

Every order is delivered within fifteen days at the latest, anywhere in the world. Pieces held in the atelier leave sooner; made-to-order and resized pieces use the full window. Bespoke commissions require approximately one month from enquiry to delivery.

Question 11

Collection in Antwerp

Accepted Answer

Orders can be collected at the atelier by appointment, with identification matching the order.

Question 12

Fifteen days

Accepted Answer

A piece may be returned within fifteen days of proof of delivery, on one condition: it must not have been worn and must come back in its original packaging, with its box and diamond certificate. Return postage is at the buyer's expense.

Question 13

How to return

Accepted Answer

Write to caroline@oneantwerp.com with your order number within the fifteen-day window. We will confirm the return address and how to ship the piece insured. Once it has been inspected at the atelier, the refund is issued to the original payment method — the original delivery charge and the return postage are not refunded.

Question 14

Exclusions

Accepted Answer

Bespoke commissions, engraved pieces and rings resized to a custom measurement are made for one person only and cannot be returned.

Question 15

Repairs and care

Accepted Answer

Every piece carries a two-year guarantee against manufacturing defects. Cleaning and polishing at the atelier are complimentary for life.

Information

Diamonds & certification

Orders & sizing

Price & quality

Shipping

Returns & care