The “extended warranty” insurance extends the legal guarantees for a period specified in the contract.
From the moment you purchase your Metalbox jewelry on our online platform, the original international warranty lasts for 2 years; after that, you will need an extended warranty.

Registering for the Metalbox International Warranty Extension is quick and easy.

- Have an account on the metalbox.fr website
- Buy a pack for 6 months or 1 additional year

Make sure you have the certificate of origin (or invoice) for your Metalbox jewelry
Additionally, as a courtesy, you will receive personalized care advice and communications regarding your Metalbox jewelry.
The warranty extension will cover any manufacturing defect recognized as such by the dedicated Metalbox service.
The extended warranty does not cover normal wear and tear, damage caused by improper use or handling, or any other damage excluded from the original international warranty certificate.

Metalbox offers the purchase of old, sometimes damaged, jewelry or any other object, with the aim of recovering the raw material.
The purchase price applied to purchase transactions is that of the "current rate"!
The quality of gold varies depending on its "carat weight": prices are therefore different depending on whether it is 18 or 24 carat gold.
We weigh the items in front of the consumer/seller using very precise equipment.
Since cash payments for precious metals are prohibited, we proceed by transfer to an account opened in the consumer's name.

Since the law of March 17, 2014, the purchase of precious metals by a professional from a consumer must be the subject of a written contract.

In fact, in this contract, under penalty of nullity, the following will be mentioned: the complete contact details of METALBOX, as well as our registration number in the trade and companies register,
the contact details of the consumer/seller, the date and address of the place where the contract was concluded.
The contract must also include the precise description of the objects purchased by the professional, their weight, their purity in thousandths and, finally, the sale price including all taxes.

Repurchase of precious metals and right of withdrawal

The consumer/seller has a right of withdrawal which he can exercise within 48 hours of signing the contract.
Exercising the right of withdrawal results in the reimbursement of the price paid as well as the restitution.

You can send us your questions and photos using our contact form.

Our ultrasonic cleaning machines make cleaning chains and your gemstones easy.
Whether you are a jewelry collector, a passionate enthusiast, or simply a demanding owner, these individuals are seduced by the unparalleled performance and speed of ultrasonic cleaning.
It must be said that the advantages of such a process are numerous:

It removes impurities and all types of residue or oxidation from jewelry: dust, sebum, perspiration, fingerprints, polishing residue, oils, sticky wax, caustic products, etc.
It meticulously and effortlessly cleans rings, chains, pendants, necklaces, bracelets, watches, etc.
It restores the shine of precious metals tarnished by time.
It tolerates noble metals (gold, silver, etc.) but also brass and alloys such as nickel silver. Some precious stones can also be cleaned with ultrasound, such as diamonds, rubies, sapphires, aquamarine, etc.
In addition to certain specific products, it even gives jewelry temporary protection against oxidation.
It extends the life of your jewelry and eliminates the risk of improper cleaning.

After a prolonged stay in cupboards or drawers, antique jewelry often acquires a dark and dull patina that condemns it to no longer being worn.
However, an ultrasonic cleaner can make them sparkle again and give them a new lease of life.
Thanks to this infallible cleaning method, many pieces of jewelry can be resurfaced: old-fashioned cameos, wedding earrings, keepsake necklaces, communion bracelets, christening bracelets, etc.
Ultrasonic jewelry cleaning for fast, careful and very deep cleaning of necklaces, brooches, watches, coins and other valuables.

Ultrasound reaches the hardest-to-reach areas where cloths, brushes and other conventional cleaning tools cannot penetrate.

It is used both during the manufacturing process and during future use or repairs.
If you would like our staff to take care of cleaning your jewelry, simply contact us.

Clean your jewelry regularly. A diamond shines because of the way light passes through it. However, oil, sweat, and dirt can block the light from passing through the diamond's facets. So, if you don't clean your diamonds regularly, you can't expect them to shine as they should. Diamonds are easy to clean. Simply use warm water, a soft toothbrush, and mild soap. Don't use toothpaste to clean diamonds. Soak your diamonds in soapy water, hot or boiling, for a few minutes and gently clean them with a soft-bristled toothbrush. Use a degreasing soap, and if you don't have soap, dish soap; it won't harm your diamond and will restore its shine. In addition to the face of the diamond, also clean the back, where dirt easily accumulates.