
Gemologist in Paris: expertise and appraisal of your gem-set jewelry
Paris, capital of high jewelry, is home to family treasures and collector's items. Diamond necklaces, sapphire earrings, emerald rings for sale: knowing the nature, authenticity and value of your jewelry is essential.
At Miller, a gemologist in Paris puts his expertise at your service for a precise, transparent, and documented analysis.
The key role of a gemology expert in Paris
Gemology is a scientific and market discipline:
- Identification: natural, treated (heated, filled), or synthetic stone.
- Quality assessment:
- Diamond: the 4 Cs (Carat, Color, Clarity, Cut).
- Colored stones (ruby, sapphire, emerald): intensity, saturation, origin (determining price factor).
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Valuation: appraisal based on condition, fashion, rarity, and current market.

Precious stone appraisal services
- Oral appraisal: a quick first opinion to determine whether to proceed further.
- Written report (inheritance, division, insurance, sale):
- Complete technical description
- Market value or replacement value
- Enforceable and archivable document to protect your assets
How does a precious stone appraisal work?
A rigorous protocol ensures reliable conclusions:
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Initial observation: 10x loupe, checking inclusions and size.
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Weighing: carat scale (estimation if stone is mounted).
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Instrumental analysis: binocular microscope, refractometer, spectroscope, filters, UV…
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Synthesis & report: a true identity card of the gem with photos and measurements.
Preparing for your jewelry & stone appraisal
- Bring any available certificate (GIA, HRD, LFG…)
- Include invoices, old quotes, or insurance documents.
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Gently clean your jewelry: a clean stone reveals its brilliance better.
Authenticity: a major issue for antique jewelry
The market includes imitations and synthetics (e.g., moissanite for diamond, composite ruby).
Only an accredited gemologist can definitively distinguish a heated ruby from a composite, or a natural diamond from another material. A prior appraisal secures the sale and purchase of jewelry at the right price.

Miller: your trusted gemologist, Rue Saint-Honoré
Since 1989, Miller Paris (near Place Vendôme) has been a benchmark in luxury pre-owned jewelry.
- Free, no-obligation appraisal of your set jewelry (diamond, ruby, sapphire, emerald)
- If you wish to sell a piece of jewelry: immediate cash purchase or consignment, depending on the most advantageous solution
- Custom advice based on gemological expertise and market reality
Visit us or start online
- In store: 233, rue Saint-Honoré, Paris 1ᵉʳ
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Online: click on the button below, submit photos and information, and we will get back to you with an initial evaluation.
REQUEST A GEMOLOGICAL ANALYSIS
FAQ – Gemologist in Paris
Do you provide an expert appraisal report?
Yes. Upon request, we provide a written report detailing characteristics and value (for insurance, inheritance, division).
Is the appraisal truly free?
Yes, the initial appraisal in-store is free and without obligation.
Can I sell after the appraisal?
Yes: immediate repurchase (quick payment) or consignment to optimize the net seller's price.























