In addition to the legal warranties that may apply (i.e., for sales subject to French law, the guarantee of conformity governed by articles L217-4 to L217-12 of the French Consumer Code and the guarantee of hidden defects governed by articles 1641 to 1648 and 2232 of the French Civil Code), Kern offers its customers a 2-year warranty.

Kern Warranty Conditions:  

This warranty is extended to customers who have purchased Kern jewelry.

Documents to be submitted to benefit from the guarantee :  

In order to benefit from the guarantee, the customer must hand in the jewel to Kern. The customer must also accompany the delivery of his jewel with the certificate of authenticity duly completed, dated and signed at the time of purchase and the purchase invoice. 

Shipping costs are at the customer’s expense and include postage, insurance and packaging. 

Duration of the guarantee :

Kern warrants its jewelry against defects in materials and workmanship for a period of 2 (two) years from the date of purchase. 

At the end of the two-year period, any repair or replacement will be charged. 

Services covered :

After checking the condition of the jewelry and the validity of the application of this warranty, Kern will repair it free of charge within a reasonable period of time after the jewelry is returned.

Once the jewel is repaired, the customer is informed that his jewel is ready to be sent to his home. 

In case of repair :

The repaired jewel will be guaranteed for one year (or for the remaining period of the two-year guarantee)

Exclusion of warranty : 

The warranty does not apply in the following cases : 
– normal wear and tear or ageing of the jewellery. 

– abnormal use of the jewel (examples : shocks, crushing, falls…). 
– failure to follow the advice on the use and care of the jewellery and any negligence or defect in the care, supervision, transport or storage of the jewellery.
– jewelry that has been lost, stolen, or subject to any other event beyond the control of Kern, such as fire.
– jewelry that has undergone any transformation or intervention, repair or disassembly by an unauthorized third party (i.e. other than by the Kern workshop)

Provisions relating to legal guarantees applicable to sales subject to French law :

Article 1641 of the Civil Code 
The seller is bound by the warranty for hidden defects of the thing sold which make it unfit for the purpose for which it was intended, or which so diminish this use that the buyer would not have acquired it, or would only have given a lesser price, if he had known about them.

Article 1648 paragraph 1 of the Civil Code  
The action resulting from redhibitory defects must be brought by the purchaser within two years of the discovery of the defect. 

Article L217-4 of the Consumer Code 
The seller delivers a good in conformity with the contract and is responsible for the defects of conformity existing at the time of the delivery.
He shall also be liable for any lack of conformity resulting from the packaging, the assembly instructions or the installation, if the latter was made his responsibility by the contract or was carried out under his responsibility.

Article L217-5 of the Consumer Code 
The property is in conformity with the contract:
(1) whether it is fit for the use ordinarily expected of similar property and, if so :
– if it corresponds to the description given by the seller and has the qualities that the seller has presented to the buyer in the form of a sample or model;
– it has the qualities that a purchaser may legitimately expect, having regard to the public statements made by the seller, the producer or his representative, in particular in advertising or on labelling;
2° Or if it has the characteristics defined by mutual agreement between the parties or is suitable for any special use sought by the buyer, brought to the attention of the seller and accepted by the latter.

Article L217-12 of the Consumer Code 
The action resulting from the defect of conformity is prescribed by two years as from the delivery of the good.

Article L217-16 of the Consumer Code 
Where the buyer asks the seller, during the period of the commercial guarantee granted to him at the time of the acquisition or repair of movable property, for a repair covered by the guarantee, any period of immobilisation of at least seven days shall be added to the duration of the guarantee that remained to run.
This period shall run from the date of the buyer’s request for action or from the time the goods in question are made available for repair, if this is after the request for action. “

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Use & Maintenance

Your Kern jewel has been designed with great care according to the requirements and rules of the jewelry industry. Each step of the manufacturing process has been carried out with the utmost care, in order to create an exceptional piece. To keep it looking its best, we recommend that you carefully follow our maintenance tips:

Tips for use

When you are not wearing it, it is preferable to store your jewellery in its original case or pouch, thus avoiding rubbing with other jewellery, shocks and scratches.

When wearing your jewelry, be sure to handle it gently to avoid bumps and falls. It is preferable to remove your jewellery when practising sports.

Avoid contact with salt water, sand, cosmetics, perfumes, detergents and any corrosive product that could alter precious metals and gems.

We recommend that you have the condition of your jewellery checked every year. Do not hesitate to make an appointment with our workshops to have the crimps, clasps and their double security checked. During this visit, our jewellers will know how to revive the brilliance of your pieces and give back to the gems all their vivacity.

Maintenance instructions

To intensify the shine of your jewelry, do not hesitate to rub them with a soft and dry cloth. If you wish to clean them, you can immerse them in soapy water (PH neutral soap) to eliminate impurities due to pollution.

Then rinse them with clean water and dry them carefully with a soft cloth.

This procedure does not apply to bracelets set with emeralds, for which we recommend special attention.

Polishing and rhodium-plating operations, which are effective in restoring the shine to your jewellery, cannot be repeated too frequently.

The first polishing and rhodium plating are offered by Kern. The following, which should preferably be carried out in our workshops, are at the customer’s expense.

Quality of the Gems

The white diamonds used by Kern are of GVS quality

Provenance: Canada, Republic of South Africa and Namibia.

G indicates extra white. The classification ranges from D, for exceptional white +, to Z for highly coloured diamonds.

VS, for Very Small Inclusion, determines the purity of the stone, meaning that the inclusions are hardly visible with a X10 magnifying glass.

SELECTION OF OUR DIAMONDS : Respectful of the Kimberley processKern is committed and responsible and places the utmost importance on the origin of its diamonds. They come from legitimate, authorized sources not involved in the financing of armed conflicts and in compliance with United Nations resolutions.

The Kimberley ProcessThe diamond industry is committed to ensuring that no rough diamonds in circulation on the world market are “conflict diamonds”, as initiated in 2000 by the UN, diamond producing states, the diamond industry and NGOs. Today, it brings together more than 80 countries, representing the vast majority of players in the rough diamond production and trade.

In January 2003, the Kimberley Process Certification Scheme (KPSC) came into effect, in order to reinforce the traceability of gems. Under this certification system, all rough diamonds must travel in sealed containers and be accompanied by a numbered certificate of origin issued by the government authorities of the exporting country. https://www.kimberleyprocess.com

Kern selects AAA quality sapphires

Origin : Ceylon

We speak of an “A” quality gem for a good quality stone, “AA” when the quality is superior, and “AAA” when the stone is truly exceptional. Generally speaking, quality refers to the beauty and intensity of colourto the transparency of the stone (the more transparent the stone, the more quality it can claim to be), and finally to the quality of its cut.

The black diamonds of the House of Kern

Origin: Australia then processed in Israel

In order to obtain a homogeneous color and a beautiful brilliance, the black diamonds used for our Kern creations have been treated in order to embellish them and to obtain an exceptional intensity and hue.

Brown diamonds (chocolate) from the House of Kern

Origin : Australia

Of natural color and not treated, the brown and champagne diamonds present a brightness guaranteeing their vivacity.

The emeralds of the House of Kern

Provenance From the Ural Mountains, India, Brazil, Zambia, Pakistan and Colombia.

Emerald is not a soft stone, but it is naturally embedded with internal frosts that make up the emerald garden. Weakened by its natural structure, it requires more attention than other gems.

It is advised not to expose emeralds to strong heat, sun and thermal shocks. It is best to avoid contact with chemicals, such as cleaning products, cosmetics and perfumes.

The tsavorites of the Kern House

Origin Tanzania and Madagascar

The tsavorites are a variety of garnet that we propose in gradient with different shades of green color on our creations. It gets its green colour from traces of vanadium and chromium.

This stone is rare, (it is estimated that there are still 200 times less on earth than there are emeralds), unknown, and almost devoid of inclusions. There are soft green tsavorites, and others bottle green.

The blue diamonds of the House of Kern

Origin: Australia, South Africa, India

Blue diamonds owe their colour to the presence of Boron in the heart of their structure, thus requiring particular geophysical conditions for their formation. This explains why only three mines in the world produce the bulk of natural blue diamonds.

Ethical gold

Kern jewels, made of 18 carat gold, are available in yellow gold, white gold, pink gold.

Kern sources its gold from a company that has been a member of the Responsible Jewellery Council (RJC)* since 2020.ember of the Responsible Jewellery Council (RJC)* since 2020, it is a commitment to exemplarity and transparency in its ethical, environmental and social approaches to sourcing gold and platinum.
*RJC (Responsible Jewellery Council)
The RJC is an international non-profit organization with over 300 members working transparently to promote responsible ethical, social and environmental practices that respect human rights throughout the jewellery supply chain, from mining to retail.

Shipping & Returns


Your Kern jewelry is shipped Monday through Friday, excluding holidays. We do not deliver on weekends.

All Kern articles ordered are insured by us until delivery.

We guarantee you the security of the preparation and the routing of your order.

Your jewels are delivered in their Kern box and pouch

Purchase of a custom made bracelet :

Allow 3 to 4 weeks for the creation of your bracelet.

It will be delivered to you in its magnificent jewel case with its certificate of authenticity.

An email will inform you that your bracelet is ready.

A tracking number will be indicated to follow your order on our website under the heading “
my account/
my orders

Free delivery in the European Union:

Your order is prepared within 2 working days following the date of the confirmation email that your custom made bracelet is ready.

Free delivery to countries outside the European Union:

Delivery is made within 3 to 5 working days following the date of the the date of the confirmation email that your custom bracelet is ready.

Any possible customs duties or import taxes that you may have to pay upon receipt of your package.


Return of a custom made bracelet :

Write to us to let us know the reasons for your return by e-mail at hello@bracelets-kern.com

Log in to your account to make your request and you will receive your pre-paid return slip.

For all shipments made in the European UnionIf you are not satisfied with your order, you can return your items within 15 days of receiving your order and in accordance with the return policy of the House of Kern mentioned above in the title ” Under what conditions can items be returned, exchanged or refunded “.

For all shipments outside the European Union, your items can be returned within 15 days of receipt of your order and according to the conditions of return of the House Kern mentioned just before in the title ” Under what conditions can items be returned, exchanged or refunded “.

À Under what conditions can items be returned, exchanged or refundable?

We accept returns on items that require sizing to fit your wrist.

If the bracelet needs to be enlarged, you will be asked to pay an additional fee according to the new size compared to your initial order.

If the bracelet does not match the order

The articles must be returned in their original packaging including the care instructions, the jewel case, its certificate of authenticity and the invoice with the precise reason.

What items are not refundable?

Privilege offers

Items returned worn, incomplete (care instructions, case, certificate of authenticity…), damaged or spoiled.

Size Guide


You can download and print our measuring tape on an A4 sheet.
Follow the instructions below to place the tape measure on your wrist and know your own size and write it down.


Measure your wrist, adjusting the tape measure just above your wrist bone or where you like to wear your bracelet.
Choose the size according to the way you want to wear your bracelet.
Note the measurement by adding :

Half a centimetre (+0.50 cm) for a bracelet worn closer to your skin.
One centimeter (+1 cm) for a bracelet worn more loosely.

For example :

A wrist of 15 cm, choose 15.50 cm or 16 cm depending on how you want to wear your bracelet.



13,50 – 14,00

14 – 14,50

14,50 – 15,00

15 – 15,50

15,50 – 16,00

16 – 16,50

16,50 – 17,00

17 – 17,50

17,50 – 18,00

18 – 18,50

18,50 – 19,00

19 – 19,50