Precious Stone Valuation in Paris

If you own a gemstone and are unsure of its value, our precious stone valuation service in Paris can provide you with the answer. Furthermore, should the value prove significant, we are able to obtain a certificate of authenticity on your behalf.

What you should know about precious stone appraisal in Paris

The valuation of a precious stone aims to determine the stone's worth. To do so, you require a gemmologist, a jeweller or a goldsmith who is experienced in this field and possesses the necessary equipment.

The comprehensiveness of the appraisal depends on the information you require. With a gemmologist, however, you obtain all the elements needed to determine the price of a precious stone:

• the nature of the stone — for example, a diamond,
• its colour (hue, tone and saturation),
• its shape or cut (round, oval…) and the quality thereof, based on proportions and symmetry,
• its origin,
• its clarity (based on inclusions)
• any treatments applied: traditional heat treatment has little or no effect on a stone's value — as is the case with heated sapphire — whereas other treatments can significantly reduce its price;
• carats.

A gemmologist can provide you with a laboratory certificate to make the appraisal official and attest to its value. As the valuation of a precious stone in Paris varies according to the professional's services and the testing equipment at their disposal, it is sometimes possible to have a stone identified only. This is what some people are looking for — for example, to identify a sapphire, or to determine whether they are in possession of a genuine ruby.

With Maison Bonnot, you receive a valuation in euros.

We also offer our services as gemmologists in Angers.

We appraise your precious stones in Paris

Maison Bonnot appraises your precious stone in Paris and provides you with all the essential information needed to determine its value. Given the constant evolution of the gemstone market, it is wise to consult a jewellery expert in Paris. Beyond the growing difficulty of sourcing certain stones naturally, this market is subject to trends. A stone of little value a few years ago may become increasingly sought after — as is the case, for example, with the green sapphire.

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Why have your stone appraised at Bonnot Paris?

By choosing to have your precious stones appraised at Bonnot Paris, you are entrusting them to a professional gemmologist and precious stone dealer who works without intermediaries. Appraisals are complex undertakings, governed by a multitude of interdependent criteria. They require a thorough command of various instruments and the ability to apply highly precise technical standards. To identify a precious stone, gemmology is a scientific discipline that cannot be improvised.

Alongside this, Bonnot Paris is also a jeweller. This dual expertise is ideal for having your stones or jewellery valued and for receiving the best advice on the purchase of precious stones or their setting in a new creation.

The cost of a precious stone valuation

• Allow €150 for an appraisal.
• A certificate from the French gemological laboratory costs €150.

It goes without saying that online precious stone valuation is not possible. It is essential that you bring your stones to us in person for a thorough, formal appraisal. Authenticating and valuing a precious stone in Paris generally takes around one hour, though certain appraisals may take longer.

Further reading:

• The world's most expensive precious stones
• Discovery of an exceptional bicolour diamond in Botswana