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GET https://www.gcalusa.com/certificate-search.html

<form method="get" action="https://www.gcalusa.com/certificate-search.html" class="search">
  <input name="certificate_id" id="certificate_id" placeholder="Enter your Certificate No." type="text">
  <button type="submit"><i class="fa fa-search"></i></button>
</form>

Text Content

 * News Blog
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 * Expert Services Expert Services
   Expert Services
    * Jewelry Appraisals
    * Damage & Restoration Advisories
    * Risk Analysis for Insurance
    * Inventory & Collateral Audits
    * Forensic & Litigation Support
    * Law Enforcement Support
    * Donald A. Palmieri Bio
    * Palmier's Market Monitor
    * Contact Us

 * Lab Services Lab Services
   Lab Services
    * Cut Analysis
    * Diamond Journey
    * Photography
    * Gemprint
    * Laser Inscription
    * Quality Assurance
    * Natural Diamond Verification
    * Precious Metal Testing

 * Grading & Certification Grading & Certification
   Grading & Certification
    * GCAL Cut Grade
    * Natural Diamonds
    * Lab Grown Diamonds
    * Fine Jewelry
    * Colored Diamonds
    * Colored Gemstones
    * Cultured Pearls
    * Verify Your Certificate
    * Jewelers Mutual Insurance
    * New Client Application
    * Submission Instructions
    * Elements of a Guarantee Certificate

 * 4c's Learning Center 4c's Learning Center
   4c's Learning Center
    * Diamond Carat Weight
    * Diamond Color
    * Diamond Clarity
    * Clarity Photomicrograph Gallery
    * Diamond Cut
    * Diamond Certification
    * How the 4C's Affect Price
    * Beyond the 4Cs
    * Instructional Diamond Grading
    * Jewelry Consumer Resources
      

 * The GCAL ADVANTAGE The GCAL ADVANTAGE
   The GCAL ADVANTAGE
    * About GCAL By Sarine
    * Our Philosophy
    * Our Standards
    * Our Guarantee
    * ISO 17025 Accreditation
    * Diamond Journey
    * GCAL CV
    * Testimonials
    * In the Media
    * Contact Us
    * Blog

100%
Guaranteed


DIAMOND CERTIFICATION

We believe your jewelry purchase should be one of joy. You should feel confident
you're getting what you pay for

We believe that grading authorities should stand behind their work. That all
diamonds can be, and should be, graded accurately and consistently

Learn More

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DISCOVER THE FUTURE
OF DIAMOND GRADING

Learn More


PLANNING YOUR PURCHASE



GET THE KNOWLEDGE TO ASK THE RIGHT QUESTIONS. TO FEEL CONFIDENT IN YOURSELF.
CONFIDENT IN WHAT YOU GIVE.
TO MAKE SURE THAT YOU'RE GETTING THE BEST DIAMOND FOR YOUR MONEY.

Learn about the 4C's

The 4Cs are the foundation of assessing diamond quality. Learn what they mean so
you can find the perfect diamond.

Learn More
Why you need a GCAL certificate

Before investing in a diamond, know who's rating the quality. Each grade
difference means big money. Be sure your diamond is accurately graded.

Learn More
HOW THE 4C'S AFFECT PRICE

Bigger or higher quality? See how each diamond grading factor affects price so
you can make the right decision within your budget.

Learn More
verify your GCAL certificate verify now


EXPLORE OUR SERVICES

WHEN YOU NEED GEMOLOGICAL EXPERTISE, RELY ON GCAL'S TEAM OF
HIGHLY TRAINED GEMOLOGISTS, FOR ACCURATE AND UNBIASED ANALYSIS.

 * 
   CERTIFICATION
   CERTIFICATION
   
   Ensure accurate 4C's quality grading of your diamonds with unbiased and
   guaranteed GCAL certification
   
   Read More
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   ANALYTICAL SERVICES
   ANALYTICAL SERVICES
   
   Verify the authenticity of your natural loose or mounted diamonds and detect
   undisclosed lab grown diamonds
   
   Read More
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   METAL TESTING
   METAL TESTING
   
   Confirm your jewelry meets FTC standards for precious metal content and is
   free of toxic metals
   
   Read More
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   QA TESTING
   QA TESTING
   
   Implement a hassle-free testing protocol to ensure all your jewelry products
   meet your corporate standards
   
   Read More
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   GEMPRINT
   GEMPRINT
   
   Protect your investment with the most advanced diamond fingerprinting and
   tracking technology
   
   Read More
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   EXPERT SERVICES
   EXPERT SERVICES
   
   Rely on our experienced experts to provide solid evidence based reports and
   expert witness testimony
   
   Read More
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   APPRAISALS
   APPRAISALS
   
   Evaluate fine jewelry assets for estate, fair market, liquidation, collateral
   and legal matters
   
   Read More
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   PALMIERI'S MARKET MONITOR
   PALMIERI'S MARKET MONITOR
   
   Subscribe to the diamond and gemstone 'blue book' pricing guide for wholesale
   and auction markets
   
   Read More


PROTECT YOUR
DIAMOND INVESTMENT

register now
IN THE MEDIA
CNN International
CSI Las Vegas
Today
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GCAL LAB TOUR VIDEO

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GCAL LAB TOUR VIDEO


DIRECT ASSESSMENT IMAGING
 * symmetry & brilliance
   
   The most true-to-life method to assess CUT quality is by Direct Assessment
   technology
   
   View
 * HEARTS & ARROWS
   
   Precision cutting produces symmetrical patterning that is captured in hi-res
   photos
   
   View
 * 360 VIDEO
   
   Stunning videos record the sparkle and beauty of your diamonds and gemstones
   
   View
 * IMAGING
   
   Hi-res photographs of the crown and pavilion record a diamond's true beauty
   
   View


WHAT THEY'RE SAYING

Diamond Manufacturer, NY, NY

"Dear GCAL..we work with almost all major labs. None of which come close to the
professionalism and courtesy, shown towards us the way only GCAL can."

Jeweler, Buffalo, NY

Your certificates are always accurate and that's why I use them. I value them
equally with GIA

Online Retailer, Seattle, WA

"It has been a great partnership with GCAL, and everyone in the team goes above
and beyond their role to help us meet our business objectives."

Jeweler, Troy, MI

"You are the best in support and product. Gemprint is the best thing we have
ever done."

Jeweler, Long Beach, CA

"You guys are the best around. Once we point out your guarantee against what the
bigger labs do, there are no more questions about your lab, you put your money
where they can see it in writing. Please keep up the good work, you will
continue to get our business"

Insurance Adjuster, Worcester, MA

"Excellent all around. A great resource for more than just grading stones.
A+++++"

Insurance Adjuster, Schaumburg, IL

"GCAL always exceeds my expectations"

Jeweler, Waterville, ME

"All our employees love using the GCAL report when showing diamonds to our
customers"



Online Retailer, San Jose, CA

"Angelo and Don have been an absolute pleasure and have gone out of their way to
help us combat issues of potential counterfeit jewelry being sold"

Professional Jewelry Appraiser & Educator, Portland, OR

"It is a pleasure to do business with GCAL. The most professional and accurate
lab I have worked with in my 30 years of being in the industry"

Diamond Manufacturer, NY, NY

"Great company to deal with. Honest ,fair, and customer service is the best of
any lab"

Jeweler, Johnstown, PA

"Appreciate Mr. Palmieri's monthly overview of the state of the global diamond
community"

Jeweler, Phoenix, AZ

"The services of GCAL are exceptional. Their verification process should be an
industry standard. This is an essential consumer protection program"

Jeweler, New York, NY

"Fantastic organization with wonderful ethical culture"

Manufacturer, Lafayette, LA

"GCAL is open, transparent and very easy to work with, they really stand out
against other laboratories"

 * 
   Expert
   Services
 * 
   Certification
 * 
   metal
   testing
 * 
   Light
   Performance
 * 
   laser
   inscription
 * 
   gemprint
 * 
   learning
   center
 * 
   Photography


ABOUT US

 * Our Guarantee
 * Our Philosophy
 * Our Standards
 * ISO 17025 Accreditation
 * Donald A. Palmieri Bio
 * GCAL Curriculum Vitae
 * Blog


CONTACT US

Gem Certification & Assurance Lab
580 Fifth Avenue, 27th Floor
New York, NY 10036
T 212.869.8985


EMAIL US


OUR SERVICES

 * Natural Diamond Certification
 * Lab Grown Diamond Certification
 * Natural Diamond Verification
 * Quality Assurance
 * Precious Metal Testing
 * Diamond Cut Analysis
 * 360 Video & Photography


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