Your Assurance of Authenticity and Value
A gemstone certificate is your assurance of authenticity and value — an expert document that confirms what your eyes can see, and what only gemological testing can prove.
At Sosna Gems, transparency and trust are at the core of everything we do. Whether you’re purchasing a loose gemstone or a finished piece of jewelry, our goal is to ensure complete confidence in every stone you own.
Our In-House Certificate
Every gemstone or jewelry piece purchased from Sosna Gems comes with a basic in-house certificate issued by our gemological team.
This document confirms the authenticity and natural origin of the gemstone and provides detailed information such as:
- Gemstone variety and species
- Carat weight
- Cut and shape
- Color and clarity
- Treatment status (if any)
- Additional notes on fluorescence or optical features
This in-house certification ensures that every gemstone we sell has been carefully inspected and documented by professional gemologists.
If you later decide to obtain an international certificate — for example from GIA, IGI, or ČGL — you can contact us anytime after your purchase.
We’ll assist you throughout the process and recommend the most suitable laboratory for your gemstone type and purpose.
Optional International Certification – GIA, IGI, ČGL and More
For clients seeking an additional level of assurance, Sosna Gems offers optional certification by internationally recognized gemological laboratories, including:
- GIA (Gemological Institute of America)
- IGI (International Gemological Institute)
- ČGL (Czech Gemological Laboratory)
- and other reputable institutions (AIG, AGR, ITLGR, HGTL, GEMTRUE)
This is a paid, optional service available to all Sosna Gems customers.
Our gemological specialists handle the entire process, ensuring your gemstone is professionally analyzed and documented according to international standards.
Certification Process
- Secure shipment of the gemstone or jewelry piece to the chosen laboratory
- Independent testing and certification by expert gemologists
- Safe return of the certified item to Sosna Gems
Please allow approximately 30 days for completion, depending on laboratory workload and international logistics.
Already Certified Gemstones
Some gemstones in our collection already come with a valid external certificate from a recognized gemological institute (e.g., GIA, IGI, ČGL).
These items are clearly marked and ready for immediate shipment.
Certification Included in Price
Certain gemstones or jewelry pieces include certification within the purchase price, but may still be under laboratory processing.
In such cases, delivery may take an additional 3–4 weeks.
Jewelry Certification
We also offer certification for finished jewelry — including engagement rings, investment pieces, and bespoke designs.
You can choose between our in-house certificate or an external laboratory certificate (GIA / IGI) for the center stone or the entire piece.
This documentation is ideal for insurance, gifting, or resale.
If you’d like to certify your jewelry through an external lab, contact us for a personalized quote — pricing depends on gemstone type, weight, and design complexity.
Security & Authenticity Policy
All gemstones sold by Sosna Gems are delivered in a tamper-proof Gemstone Security Seal, ensuring authenticity and protection during transport.
The seal confirms that the gemstone inside has been verified and documented by our gemological experts.
Once the security seal is opened or removed, Sosna Gems can no longer guarantee the gemstone’s identity.
From that point, responsibility for authenticity passes to the customer.
If you have your gemstone set into jewelry and later request certification, we will gladly assist.
However, in such cases, certification will confirm the gemstone’s characteristics only, not its identity with the original sealed stone.
This policy safeguards both our customers and the integrity of every gemstone we sell.
Certification Laboratories We Work With
We collaborate exclusively with internationally recognized gemological laboratories adhering to the highest global standards:
- GIA (Gemological Institute of America)
- IGI (International Gemological Institute)
- AIG (Antwerp International Gemological Laboratories)
- AGR (Asia Gemological Research)
- ITLGR (International Testing Laboratory Gems & Research Center)
- GEMTRUE
- HGTL (Himalayan Gem Testing Laboratory)
- ČGL (Czech Gemological Laboratory)
These institutions guarantee independent, objective, and verifiable grading that enhances confidence and long-term value.
Interested in Certification?
We’ll be happy to guide you through the process and prepare a personalized quote.
