Sell Your Investment Diamond at a Fair Price

Expert Diamond Merchant since 30 years

You acquired a diamond for investment purposes and now wish to sell it?
Our firm guarantees an honest appraisal, transparent evaluation,
and immediate payment — regardless of your stone's origin.

Free Estimation
Consult via WhatsApp 1985 Year of foundation 30+ Years of expertise GIA Evaluation standard 24h Payment time

Investment Diamond: Understanding Before Selling

Since the 1980s, thousands of French people have purchased diamonds presented as
"safe investments." The reality is often more nuanced. Our role is to provide you with
an honest and transparent evaluation, even if the truth is sometimes hard to hear.

We evaluate all types of investment diamonds:

GIA Certified Diamonds

The global standard in gemology. The GIA certificate guarantees a rigorous evaluation recognized on all international markets.

Most reliable market value

IGI / HRD Certified Diamonds

Recognized and reliable European laboratories. IGI and HRD certificates allow for a precise evaluation of your stone, with good market valuation.

Reliable and recognized evaluation

CIBJO / SCAN Certificates

These certificates, frequently used in the 80s-90s for investment sales, often show significant overvaluations. Our expertise determines the true value.

Expertise needed — we tell you the truth

Why Does the Resale Price Differ from the Purchase Price?

This is the most common question from our clients. Here are the main reasons, which we explain transparently:

Initial commercial margins

Diamond investment companies apply margins of 30 to 60% on the market price. Your diamond is often worth less than the price paid, regardless of its quality.

Overvalued certificates

Some certificates (CIBJO, SCAN) assign higher grades than reality. A diamond certified "E/VVS1" by a commercial laboratory may be re-evaluated "G/VS2" according to GIA standards.

Market fluctuations

The price of diamonds evolves according to global supply and demand. Stones from 0.50 to 1 carat have held up better than very small stones, but the market has experienced significant corrections.

"Our commitment: to tell you the truth about your diamond's value. We prefer a relationship of trust to a dishonest transaction."

Diamantaires Paris OG, since 1985

Indicative Buyback Values

These ranges are indicative for diamonds of decent quality (color G-H, clarity VS).
The exact value depends on a full 4C analysis and the certificate.

0.30 ct Diamond

€300 — €600

Depending on color and clarity

0.50 ct Diamond

€800 — €2,500

Depending on color and clarity

1.00 ct Diamond

€3,000 — €8,000

GIA: optimal valuation

1.50 ct Diamond

€5,000 — €15,000

High demand for this size

2.00 ct Diamond

€8,000 — €25,000

Individual appraisal

3.00 ct+ Diamond

Upon appraisal

Exceptional stones

Indicative values — each diamond undergoes a free individual appraisal.

The Excellence of Diamantaires Paris OG

The expertise of a firm founded in 1985, at the service of your investment diamonds

Advantages	Diamantaire Paris	Other providers
Honest evaluation	✓	✗
Free appraisal	✓	Variable
Immediate payment	✓	✗
No commission	✓	✗ (up to 20%)
Total confidentiality	✓	✗
Outbidding on competing offers	✓	✗

Our Expertise in Three Steps

1

Confidential Appraisal

Thorough analysis of your diamond by our master diamond merchants: evaluation of the 4Cs
(carat, color, clarity, cut), verification of the certificate, comparison with international market prices.

2

Transparent Proposal

We present our buyback offer with a detailed explanation of our evaluation.
If your certificate is overvalued, we explain it to you with pedagogy and respect.

3

Immediate Payment

Upon acceptance of our proposal: secure bank transfer or bank check,
on the same day. No commission, no hidden fees, no delays.

Frequently Asked Questions

Is my investment diamond worth what I paid?

In most cases, no. Investment companies apply significant margins (30 to 60%) and sometimes use certificates that overvalue the stone's characteristics. We give you the true value, based on international market prices and GIA criteria.

What is the difference between a GIA certificate and a CIBJO certificate?

GIA (Gemological Institute of America) is the global standard: its criteria are strict and recognized everywhere. CIBJO or SCAN certificates, used in the 80s-90s, apply different standards that tend to overvalue color and clarity. A diamond certified D/IF by CIBJO may be re-evaluated F/VS1 or lower by GIA standards.

How long does the appraisal take?

The appraisal of an investment diamond typically takes 30 to 45 minutes. We analyze the stone under a loupe and microscope, verify the certificate, and present our offer promptly. You leave with payment on the same day if you accept.

I have several investment diamonds to sell. Is that possible?

Absolutely. We buy back lots of investment diamonds, regardless of quantity. Each stone is individually appraised. For large lots, we can arrange a dedicated appointment in our Parisian salon or come to your home.

Is the original certificate necessary?

The certificate facilitates appraisal but is not essential. Our master diamond merchants evaluate the stone based on its actual characteristics, independently of any certificate. If the certificate overvalues the stone, our appraisal takes precedence.

Get an Honest Estimate for Your Diamond

Schedule an appointment for a confidential and non-binding appraisal.
We welcome you in our salon in the heart of Paris.

Call 01 48 87 23 37
Consult via WhatsApp
Send an email