
Gemologist in Paris: expertise and appraisal of your gem-set jewelry
Paris, capital of fine jewelry, is home to family treasures and collector's pieces. A diamond necklace, sapphire earrings, emerald ring for sale: knowing the nature, authenticity, and value of your jewelry is essential.
At Miller, a gemologist in Paris offers their expertise for a precise, transparent, and documented analysis.
The key role of a gemologist 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 (a determining price factor).
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Valuation: assessment based on condition, fashion, rarity, and current market.

Precious stone appraisal services
- Oral appraisal: a quick initial opinion to determine if further analysis is worthwhile.
- Written report (for inheritance, division of assets, insurance, sale):
- Comprehensive technical description
- Market value or replacement value
- Legally binding and archivable document to protect your assets
How is a precious stone estimated?
A rigorous protocol ensures reliable conclusions:
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Initial observation: 10x loupe, checking inclusions and cut.
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Weighing: carat balance (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 for the gem with photos and measurements.
Preparing for your jewelry & stone appraisal
- Bring any available certificates (GIA, HRD, LFG diamond certificates…)
- 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 challenge for antique jewelry
The market includes imitations and synthetic materials (e.g., moissanite for diamond, composite ruby).
Only a certified gemologist can reliably distinguish a heated ruby from a composite, or a natural diamond from another material. A prior appraisal ensures the sale and purchase of jewelry at a fair price.

Miller: your trusted gemologist, rue Saint-Honoré
Since 1989, Miller Paris (near Place Vendôme) has been a benchmark for second-hand luxury jewelry.
- Free and non-binding appraisal of your set jewelry (diamond, ruby, sapphire, emerald)
- If you wish to sell a piece of jewelry: immediate purchase (quick payment) or consignment, depending on the most advantageous solution
- Customized advice based on gemological expertise and market realities
Visit us or start online
- In-store: 233, rue Saint-Honoré, Paris 1er
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Online: click the button below, send photos and information, and we will get back to you with an initial assessment.
REQUEST A GEMOLOGICAL ANALYSIS
FAQ – Gemologist in Paris
Do you provide an appraisal report?
Yes. We provide a written report upon request, detailing characteristics and value (for insurance, inheritance, division of assets).
Is the appraisal really free?
Yes, the initial appraisal in-store is free and non-binding.
Can I sell after the appraisal?
Yes: immediate purchase (quick payment) or consignment to optimize the net seller price.























