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Precision Gem Grading Laboratory

Precision Gem Grading Laboratory

America’s first gem lab to offer diamond grading with scientific accuracy

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  • Grading & Certification
    • Diamond Grading Certificate
    • ImaGem Secure Diamond Fingerprinting
    • Light Behavior Certificate
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Author: pggl-admin

Educational Articles

Precision in Diamond Grading and its impact on your Diamond’s value

by Dr. Lalit K. Aggarwal Diamonds are rare and their market value depends on their weight and quality. Light performance of a diamond, color, and lack of inclusions and flaws …

Educational Articles

What is an appraisal and why do you need an appraisal?

by Rick Lewis (G.G., GIA) of Lewis Jewelry Appraisal Services An appraisal describes jewelry, a diamond, or a gemstone in a great deal of detail and assigns a value to it. …

Educational Articles

Light Behavior & Your Diamond

ImaGem’s light behavior is based on direct measurement and human perception. With our system, what you see is what you get. With this system we select diamonds that are brilliant; …

Educational Articles

  • Precision in Diamond Grading and its impact on your Diamond’s value
  • What is an appraisal and why do you need an appraisal?
  • Light Behavior & Your Diamond

Reviews

Easy and quick process

I used them to do an appraisal. The process was very easy and everyone there was amazing. This was the first time I had to get anything appraised and I will be going back.

Jackie D.
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About Us

Precision Gem Grading Laboratory was launched in 2007 to serve the needs of the gem industry and consumers using state of the art ImaGem technology and expert gemologists.

Reviews

We’d love to hear about your experience at PGGL. Visit our Reviews page to read and submit your review. Thank you!

Blog

  • Precision in Diamond Grading and its impact on your Diamond’s value
  • What is an appraisal and why do you need an appraisal?
  • Light Behavior & Your Diamond

Got Questions?

Learn about appraisals, diamond grading certificates, light behavior, digital fingerprinting, ImaGem technology and how PGGL’s certification is different from traditional labs.

 

Contact Us

Address:
Lancaster Ave. Ardmore PA 19003
Hours: BY APPOINTMENT ONLY
Phone: +1-215-774-9406
Email: info@pgglab.com

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