Verify Authenticity, Discover Beauty.

Your trusted partner for precise gemstone identification, grading, and certification.

Verify Your Gemstone Report

Enter your unique certificate ID to instantly view and verify the details of your gemstone report.

Please enter a valid Certificate ID (e.g., CGL123456789).
Want to verify an old report card? Click here

Our World of Gems

Collection of colorful gemstones
Vibrant Array of Precious Stones
Close up of a sparkling diamond
Exquisite Diamonds, Certified Quality
Gemologist inspecting a gemstone
Precision Grading by Expert Gemologists
Various raw and polished gemstones
From Rough to Radiant: The Gemstone Journey

About CGL

Gemstone lab equipment

Precision, Trust, Excellence in Every Stone.

At CGL, we are dedicated to providing unbiased and accurate gemstone identification and grading services. Our state-of-the-art laboratory is equipped with advanced technology and staffed by certified gemologists committed to upholding the highest standards of integrity and precision.

Whether you're a jeweler, a collector, or buying your first precious stone, CGL [Crown Gems Laboratory] offers the assurance you need. We provide comprehensive reports that detail every aspect of your gemstone, from its origin to its unique characteristics, ensuring complete transparency and confidence in your purchase.

Explore the World of Gemstones

Diamond Gemstone

Moissanite

The hardest synthetic substance on Earth, renowned for its brilliance and fire. Valued by the 4Cs: Cut, Carat, Clarity, and Color.

  • Hardness: 9.25 (Mohs scale)
  • Colors: Colorless to various hues
sapphire.jpg

Sapphire

A precious gemstone, typically blue, but also comes in a rainbow of other colors (fancy sapphires).

  • Hardness: 9 (Mohs scale)
  • Colors: Blue, Pink, Yellow, Green, Orange, Purple
  • Origin: Sri Lanka, Madagascar, Australia, Montana
Ruby Gemstone

Ruby

Known for its vibrant red color, rubies are among the most historically significant and valuable gemstones.

  • Hardness: 9 (Mohs scale)
  • Colors: Red (various shades)
  • Origin: Myanmar, Thailand, Mozambique
emerald.jpg

Emerald

A captivating green gemstone, prized for its intense color and often characterized by natural inclusions.

  • Hardness: 7.5-8 (Mohs scale)
  • Colors: Green (various shades)
  • Origin: Colombia, Brazil, Zambia

Get in Touch

We're Here to Help!

  • Email Us

    cgl.gemslab@gmail.com

  • Reach Out

    Paris , Singapore , Berlin
    Dubai , Jakarta , Bangkok

    Regional Branch

    Bengaluru

Reach out to us for any inquiries about gemstone certification only