Certificate
A diamond certificate (or grading report) is an independent evaluation of a diamond’s quality. It confirms the stone’s carat weight, colour, clarity, cut, and other characteristics using internationally recognised grading standards. Choosing a certified diamond ensures transparency, accuracy, and trust — especially in a market where some sellers may self-certify stones.
At Azena, we work only with respected gemological laboratories and international standards, each known for their specific strengths:
Certification Bodies
GIA – Gemological Institute of America
The most authoritative and trusted grading laboratory worldwide. GIA sets the global benchmark for strict and consistent grading. A GIA certificate guarantees highly reliable and conservative assessment of the 4Cs.
IGI – International Gemological Institute
One of the largest global labs and the leading authority for lab-grown diamonds. IGI was among the first to establish dedicated grading standards for lab-grown stones, making it extremely popular for modern jewellery and commercial collections.
HRD – Hoge Raad voor Diamant (Diamond High Council)
A respected European laboratory based in Antwerp. HRD provides detailed grading reports using European methodologies. While well-regarded, its grading can sometimes appear slightly more flexible compared to GIA’s stricter standards.
SCS – SCS Global Services
This certification follows the SCS-007 Jewelry Sustainability Standard, focusing on ethical sourcing, traceability, climate neutrality, and responsible production. SCS certification highlights sustainability rather than traditional 4C grading alone.
GCAL – Gem Certification & Assurance Lab
Known for scientific precision and guaranteed grading accuracy. GCAL offers advanced analysis tools, including the 8X cut grade, providing deep insight into light performance and symmetry. Ideal for high-end cut-driven stones.
Azena Grading
Our in-house certification tailored to our inventory. Azena Grading provides consistent, transparent quality assessment aligned with industry best practices, ensuring reliable standards across our full selection.
Always choose a diamond with an independent certificate. It ensures you know exactly what you’re buying — and protects the long-term value of your stone.
