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Best sell your diamonds online 100% Seller Protection

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Selling a diamond can be an excellent opportunity to face a temporary liquidity problem, a chance to finance a training course, home renovation, even a vacation or to take a whim without touching the bank account.


Whatever your reason for selling a diamond or diamond jewelry, it is good that you know that there is a difference between selling gold and selling jewelry with set stones. Because while gold has a quantifiable melting value, the resale price of diamonds does not follow the same measure: this is where the selling process by an unprofessional seller can encounter difficulties.

With Auctentic you have at your disposal many international professional buyers to compete for your object, through direct bidding or at auction. Auctentic takes care of everything, authenticating your valuables and describing them in the most professional and impartial way, relieving you of worries and waste of time. Receive payment immediately for direct bids or in 6-10 days if you decide to go to auction. Your items are always fully insured until delivery to the buyer.


When you decide to sell a diamond, it is essential that you can trust it with full confidence. The Auctentic team is made up exclusively of professional gemologists with thirty years of experience in the field and international professional buyers of jewels and precious stones, to give you a fast, safe and guaranteed service for the online sale of precious stones.

Auctentic also relies solely and exclusively on the best international certification institutes such as the GIA (Gemological Institute of America) and the I.G.I. of Antwerp (International Gemological Institute) to certify jewels and stones that you decide to auction, to give you every guarantee of impartiality and offer buyers maximum confidence in the purchase.

Autentic is in fact an impartial and transparent marketplace that allows you to know every step of the sale: both the seller and the buyer are followed by an expert who guides and informs them from the first moment until the conclusion of the sale.

Auctentic is not the ultimate buyer of your diamond, so all authentications and evaluations are impartial in order to provide an accurate description of what you are selling and to allow the buyer to bid on the safe side. It is then the network of professional buyers that determines the value of your diamond based on the description, certification and photographs.

Protection of valuables.

Auctentic fully insures every shipment up to € 100,000 with Lloyd’s of London, a global leader in insurance since 1688, to better protect your valuables. Click here to learn about our policy on the total protection of your precious objects.

Free collection

Book a free collection with Ferrari, fully insured up to € 100,000 with Lloyd’s of London, from the moment you leave your home to the buyer’s home.

Timing: 24 hours

We do it all

We always give you the highest offer because we have your precious items valued by expert gemologists and show them to an audience of international buyers.

Timing: 24 hours

Payment 24 hours

Receive the best offer that you can confirm to have the immediate transfer to your current account immediately or choose to put your item up for auction.

Timing: 24 hours


We auction your valuables for you, to try to get more. We take care of preparing everything: cleaning, certificate and photos included.

Timing: 24 hours

Do you need to sell higher value diamond jewelry?

Write us via Whatsapp or call us to speak with one of our specialists, from Sunday to Thursday,  from 8 am to 6.30 pm, Friday from 8 am to 3.30 pm.


The market is affected by constant fluctuations and so is the demand for certain types of diamonds. So, before you think you can earn a very high amount from your diamond, it is important to have it evaluated in all its characteristics. And this is the first thing Auctentic’s expert gemologists do as soon as you submit a request to sell your diamond. All you have to do is send a brief description of your diamond: the Auctentic expert who follows you is thus able to immediately tell you its resale value. This way, you already know how much you can accomplish with an estimate of the market value before sending the diamond to Auctentic for its physical evaluation.

Set a realistic price for your diamond

If you expect to realize how much the retail price for your used diamond is, you are on the road to disappointment. You must keep in mind the important difference between the retail price and the resale price when setting the price to sell your diamond. When the diamond arrives at Auctentic it is cleaned, evaluated, photographed and shown to international buyers interested in buying diamonds, who bid directly to win it.

If you decide to go to auction instead, the diamond is first certified by the I.G.I or the GIA, as appropriate. In both situations, the true value of the diamond is determined by the level of demand.


Selling a diamond or diamond jewel by yourself can take a lot of time between searching for a buyer and unreliable offers. Sites like eBay for example can give you results if you already have experience in selling diamonds and if you have a high number of feedbacks as a seller.

One of the main advantages of selling your diamond through Auctentic is saving time and energy. In fact, if you want to sell diamonds in the fastest and safest way without any effort, contacting Auctentic is an excellent option. In no time, international professional buyers interested in buying diamonds take a look at your diamond and make immediate offers to win it right away. Auctentic notifies you of the highest bid received and if it is of interest to you, you will immediately receive same-day payment.

If, on the other hand, you prefer to go to auction, Auctentic takes care of the whole procedure, up to the shipment of your diamond to the final buyer. Once the reserve price has been reached or exceeded, the auction ends and you receive payment in a few days.


For most people, a diamond represents an often sentimental value, which makes it harder to get rid of it than other jewelry. This is also the reason why the perception of the value of your diamond is higher but the buyers and the market do not reflect the sentiment, only the demand that exists when you decide to sell.

In a sale, even the diamond is a product, something material. So if you feel that the time has come to let go of a symbol that depicts something or someone from your past, it means that you are also ready to sell your diamond.

What determines the value of a diamond?

Diamonds are evaluated on the basis of the 4 C from the English cut, clarity, color and carat weight, which are the cut, purity, color and weight in carats.


It refers to the shape that the cutter gave to the diamond. Today’s diamonds have a higher value than old diamonds simply because contemporary cuts are infinitely more precise than those of the past.


Those who buy diamonds appreciate stones that have very small or rather no inclusions. The less included the diamond, the higher its value.


Most diamonds are not devoid of color and have a hint of yellow or brown hues. Diamonds valued as colorless have the greatest value. Colored diamonds, on the other hand, have their own color scale for evaluation.


Anyone who owns diamond jewelry knows that the carat weight of the diamond refers to its size. The larger the diamond, the greater the carat weight and its value.


All the trendy jewels on the market, in particular:

Jewels that contain diamonds over 1 carat;

Loose diamonds over 1 carat;

Luxury watches.