Gemstone Industry

How to get Gemstone Certification from a Lab

The Mintly Team

The Mintly Team

May 24, 2024

If you own a gemstone and want to verify its authenticity, getting it certified by a reputable lab is the best way to ensure its value and quality. This certification provides a detailed analysis of the gemstone, including its type, origin, color, clarity, and any treatments it may have undergone. Here’s a comprehensive guide on how to get your gemstone certified by a lab.

1. Understanding Gemstone Certification

What is Gemstone Certification?

Gemstone certification is a process through which a gemstone’s quality, authenticity, and characteristics are evaluated by an independent gemological laboratory. Certified gemstones come with a detailed report that includes information such as the type of gemstone, its weight, dimensions, color, clarity, and any treatments it may have undergone. This certification provides buyers with confidence in the stone’s value and authenticity, ensuring that they are getting exactly what they are paying for.

Reputable laboratories, like the Gemological Institute of America (GIA) or the International Gemological Institute (IGI), use advanced equipment and standardized procedures to perform these evaluations, making the certification reliable and trusted in the gemstone market.

Why is Gemstone Certification Important?

Gemstone certification is crucial for several reasons. First, it ensures the authenticity of the gemstone, confirming whether it is natural or synthetic. Certified gems come with a report detailing their characteristics, including carat weight, color, cut, and clarity. This information helps buyers make informed decisions and avoid fraudulent purchases.

Certification also provides an objective assessment of value, which is essential for insurance purposes and future resale. Additionally, certified gemstones often hold higher market value due to the trust and verification associated with them. Lastly, certification by a reputable laboratory guarantees that the gemstone has been ethically sourced, adhering to fair trade practices. Overall, gemstone certification protects consumers and maintains industry standards.

Colour Gemstone Certificates - Global Gemmological Laboratories

2. Choosing the Right Gemological Laboratory

Not all gemstone labs are created equal. It’s essential to choose an accredited and reputable lab to ensure accurate and reliable certification.

Top Gemological Laboratories

Here are some of the most respected gemological labs globally:

  • Gemological Institute of America (GIA): Renowned for its rigorous grading standards.
  • International Gemological Institute (IGI): Known for its comprehensive grading reports.
  • American Gem Society (AGS): Offers precise cut grading and certification.
  • European Gemological Laboratory (EGL): Provides detailed gemstone analysis.

Factors to Consider

When choosing a lab, consider the following factors:

  • Reputation: Look for labs with positive reviews and industry recognition.
  • Services Offered: Ensure they offer certification for the type of gemstone you have.
  • Turnaround Time: Check how long it will take to get your gemstone certified.
  • Cost: Compare prices for certification services.

3. Preparing Your Gemstone for Certification

Before sending your gemstone to the lab, make sure it’s ready for evaluation.

Cleaning Your Gemstone

Cleaning your gemstone before certification is crucial to ensure it looks its best and is accurately evaluated. Start by soaking it in warm, soapy water for about 20 minutes. Use a mild dishwashing liquid for the solution. After soaking, gently scrub the gemstone with a soft toothbrush to remove any dirt or grime. Pay special attention to any crevices where debris might be trapped.

Rinse the stone thoroughly with warm water and dry it with a lint-free cloth. Avoid harsh chemicals or ultrasonic cleaners, as they can damage certain gemstones. Once cleaned, your gemstone will be ready for a professional appraisal, helping to reveal its true color, clarity, and overall quality.

Documenting Your Gemstone

Documenting your gemstone for certification is essential to verify its authenticity and value. Start by gathering detailed information about the gem, including its type, weight, color, clarity, and cut. High-quality photographs from multiple angles are also crucial. Next, seek a reputable gemological laboratory for an unbiased assessment.

Laboratories like GIA or AGS provide comprehensive reports after thorough examination using advanced equipment. The certification process may involve identifying treatments or enhancements done to the gemstone. Once documented, store the certificate safely and keep digital copies for backup. Proper documentation helps in insuring the gemstone, selling it, or passing it down as a valuable heirloom with verified authenticity and quality.

4. Submitting Your Gemstone

Once your gemstone is prepared, follow these steps to submit it to the lab.

Filling Out the Submission Form

Most labs require you to fill out a submission form with details about the gemstone and your contact information. Be precise and provide as much information as possible.

Packaging Your Gemstone

Package your gemstone securely to prevent damage during shipping.

  • Use a small plastic bag or gem box to hold the gemstone.
  • Wrap it in bubble wrap and place it in a padded envelope or box.

Shipping Your Gemstone

Send your package via a reliable courier service. Opt for insured shipping with tracking to ensure the safe delivery of your gemstone.

5. Understanding the Certification Process

Once your gemstone reaches the lab, it undergoes several steps before certification.

Initial Inspection

The lab’s gemologists will first conduct a visual inspection to assess the gemstone’s basic characteristics.

Advanced Testing

The gemstone undergoes various tests using specialized equipment:

  • Microscopic Examination: To inspect inclusions and surface features.
  • Spectroscopy: To analyze the light absorption and emission properties.
  • Refractive Index Measurement: To determine the gemstone’s optical properties.
  • UV Light Testing: To check for fluorescence.


After testing, the lab documents all findings in a detailed report. This report includes:

  • Identification: Type of gemstone (e.g., diamond, ruby, sapphire).
  • Weight: Measured in carats.
  • Measurements: Dimensions of the gemstone.
  • Color: Description and grading of color.
  • Clarity: Description of inclusions and blemishes.
  • Cut: Assessment of the cut quality.
  • Treatments: Any enhancements or treatments detected.

6. Receiving Your Certificate

Once the certification process is complete, the lab will send you a detailed report along with your gemstone.

Reviewing the Certificate

Carefully review the certificate to ensure all information is accurate. Important details include:

  • Gemstone Description: Verify the type, weight, and measurements.
  • Grading Information: Check color, clarity, cut, and any treatments listed.
  • Certificate Number: Unique identifier for your certificate.

Storing Your Certificate

Store the certificate in a safe place along with your gemstone. If you plan to sell or insure the gemstone, provide copies of the certificate as needed.

7. Using Your Certification

With your certified gemstone, you can confidently proceed with various activities.

Selling Your Gemstone

Selling your gemstone can be a profitable venture, but ensuring its value requires proper gemstone certification. Certification verifies authenticity and quality, adding credibility to the sale. Without it, potential buyers might doubt the gem’s legitimacy, leading to reduced offers or no sale at all.

Certified gemstones undergo rigorous testing by reputable laboratories, providing detailed information about characteristics like cut, clarity, color, and carat weight. This documentation reassures buyers of the gemstone’s true worth and often results in a higher selling price. To maximize your profits and build trust with buyers, always get your gemstone certified before putting it on the market.

Insuring Your Gemstone

Insuring your gemstone is crucial to protect your valuable investment. One key aspect to consider is gemstone certification. Certification is a process where an independent gemological laboratory evaluates and verifies the authenticity, quality, and characteristics of your gemstone. This certificate provides essential details such as carat weight, color, clarity, and cut.

When insuring your gemstone, having a certified gem can significantly simplify the process. Insurers often require certification to accurately assess the value of your gemstone and determine the appropriate coverage. Without certification, proving the worth and legitimacy of your gemstone can be challenging, potentially leading to inadequate coverage or disputes during claims. Ensure your gemstone is certified for peace of mind and proper protection.

Personal Use

Gemstone certification is crucial for personal use, ensuring you get genuine, high-quality stones. When purchasing gemstones, certified stones give you peace of mind, confirming they meet specific standards. Certification details the stone’s origin, quality, and authenticity, protecting against fraud.

It often includes information on color, clarity, cut, and carat weight. For personal collections or custom jewelry, certified gemstones maintain value over time. They also make excellent gifts, providing assurance of their worth. Always seek reputable certifying bodies, like GIA or AGS, to ensure accuracy. This way, your investment in gemstones remains secure and trustworthy.


Getting your gemstone certified by a reputable lab is essential for verifying its authenticity and value. By following this guide, you can ensure your gemstone undergoes a thorough evaluation process and receives an accurate certification. Whether you plan to sell, insure, or simply cherish your gemstone, having it certified adds significant value and credibility.

Remember to choose a reputable lab, prepare your gemstone carefully, understand the certification process, and make good use of your certificate once received. With these steps, you can confidently navigate the world of gemstones and make informed decisions about your precious assets.

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