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Balzan
Laboratories

Expert jewelry appraisals in San Francisco

Insurance Appraisals

Estate and Probate Appraisals

Divorce and Asset Distribution Appraisals

Fair Market and Liquidation Valuations

Consultations for Buying and Selling

Diamond Appraisals While You Watch

Master Gemologist Cortney Balzan in the Balzan Gem Lab at work appraising a gemstone with specialized equipment.

Balzan Laboratories provides independent, expert appraisals for fine jewelry, watches, diamonds, gemstones, and estate collections. We are completely impartial and not affiliated with any retailer, we do not buy or sell jewelry. Our advanced gemological lab ensures accurate, detailed reports.

Our Appraisal Process

1

Consultation

We begin by discussing the purpose of your appraisal, whether it is for insurance, estate, resale, or another reason, to determine the appropriate valuation method and market.

2

Cleaning and Evaluation

Your jewelry is cleaned in our ultrasonic cleaner and examined with lab-grade equipment. We identify and measure all components:

Diamonds: Weight, cut, clarity, and color 

Gemstones and Pearls: Identified, graded, and measured

Metals: Verified for content

Watches: Documented by brand, model, movement, and material

3

Documentation

You will receive:

  • A professionally printed report and digital PDF

  • Color photos of your item(s)

  • Grading system explanation

  • Definition of value and intended use

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Reports prepared in accordance with the Uniform Standards of Professional Appraisal Practice (USPAP). Most appointments take 30–60 minutes.

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