AT SALABA JEWELLERY STUDIO, WE GUARANTEE THE AUTHENTICITY AND QUALITY OF OUR GEMSTONES
Each piece of jewellery set with a natural gemstone comes with its own certificate confirming the stone’s authenticity, size and quality. Diamonds weighing more than 0.30 ct are accompanied by an international certificate issued by a renowned gemmological laboratory, such as GIA or HRD. The certificate number is laser-inscribed on the diamond’s girdle and matches the identification number shown on the certificate.
Our customers can verify that these identification numbers match at any time, giving them lifelong assurance of their diamond’s authenticity and unique identity.
WHAT INFORMATION CAN YOU FIND IN THE CERTIFICATE?
- Name of the gemmological laboratory (GIA or HRD)
- Laser inscription and identification number
- Date
- Carat weight
- Clarity grade
- Colour grade
- Cut
- Diamond proportions
- Additional information, including polish, symmetry and fluorescence
If you are unsure what any of these terms mean, read our article Diamond as an Investment.
THE GEMOLOGICAL INSTITUTE OF AMERICA (GIA)
The Gemological Institute of America developed the first diamond grading system in the mid-1930s. In 1953, it was officially introduced for use by diamond dealers, valuers and jewellers.
GIA IS THE MOST KNOWN AND WIDELY USED DIAMOND GRADING SYSTEM IN THE WORLD
In the original system, diamond colours were described using terms based on the locations where the stones were mined. Over time, this was replaced by a letter-based scale, on which D represents the highest colour grade.
To assess clarity, GIA developed a system that considers both the internal and external characteristics of a cut diamond. The highest clarity grade is Flawless (FL). When grading a diamond’s cut, its proportions, polish and symmetry are also assessed.
THERE ARE A NUMBER OF GEMOLOGICAL LABORATORIES. AMONG THE MOST FAMOUS AND RECOGNIZED INSTITUTIONS INCLUDE:
The Gemological Institute of America (GIA),
International Institute of Diamond Grading and Research (IIDGR),
The International Gemological Institute (IGI) and HRD Antwerp (HRD).
