About JTR
Carrying diamond & jewellery grading into the future.
Aimed to be the most transparent and scientifically proven diamond and jewellery grading laboratory in the world.
Who we are
JTR provides independent, transparent and accredited grading services that inspire confidence at every level of the trade.
Located at the crossroads of Europe and Asia, JTR's gemmological institute stands on the shoulders of numerous qualified women and men who have graded millions of diamonds on its premises over the past decade and a half.
What began as a dedicated gemological institute has evolved into a global partner for jewellers, manufacturers and retailers. Today, JTR's laboratories and equipment division set new benchmarks for accuracy, transparency and trust.
Tradition & innovation
Rooted in traditional grading, built for what's next
Deeply rooted in the practices of traditional diamond grading and aided by unrivalled know-how, JTR honours the standards defined by the IDC and ISO while driving forward with new technologies — from JTR360 interactive reports to the Reveal line of detection equipment.
View our standardsAchievements
Recognised results, backed by global trust
100%
5K+
Devices delivered
Reveal Diamond Detectors and Loupe S units deployed worldwide, helping jewellers verify with confidence.
IAS
Global recognition
Accredited by ILAC and IAS, and proud members of the DMIA and JVC.
4
Regions and growing
Laboratories and services trusted across North America, Europe, Asia and the Middle East.Know-how & technology
Unrivalled know-how and innovative technologies
Through extensive R&D, trademarked technology, deep data accumulation and the application of AI, JTR is at the forefront of semi-automatic and automatic grading. This is how we safeguard the gem and jewellery industry's future with transparent, responsible and accountable practices.
Discover our reports
Technology & equipment
Tools once reserved for the lab, in the hands of the trade
Our Equipment Division brings advanced solutions beyond the laboratory. Backed by a dedicated R&D center, we continuously refine AI-driven analysis and detection to anticipate the challenges of tomorrow.
Flagship
REVEAL 3S
On-device auto-detection — screen, image and separate natural from lab-grown in a single guided pass.
Equipment Division
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Detection
REVEAL Detector
Identify CVD & HPHT lab-grown diamonds anywhere.
Reveal 2S
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Everyday essential
LOUPE S
A precision-engineered jeweller's magnifier with crystal-clear optics.
Optics
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More than a laboratory