About JTR
The institution that reveals the true value of every stone.
Is the diamond natural or lab-grown? Is the color grade D or E? The right answer to these questions can be worth millions. JTR delivers those answers in ISO/IEC 17025 accredited laboratories, with processes fully aligned to IDC Rule Book standards.
Who we are
JTR provides independent, accredited grading for diamonds and gemstones. Our reports are recognized as a mark of trust at every level of the trade, from the counter to the exchange.
Founded at the crossroads of Europe and Asia, JTR has graded millions of diamonds over fifteen years. That experience is carried by a team of gemologists, women and men, each with many years of training behind them.
What began as a dedicated gemological institute has evolved into a global partner for jewelers, manufacturers and retailers. Today, JTR's laboratories and equipment division set the industry's benchmark for accuracy and transparency.
Tradition & innovation
Rooted in traditional grading, built for what's next
JTR preserves the discipline of traditional diamond grading and stays faithful to IDC and ISO standards. At the same time it carries that expertise forward with new technologies. JTR360 interactive reports connect the consumer and the jeweler to the same data. REVEAL detection devices separate lab-grown diamonds in seconds.
View our standardsAchievements
JTR by the numbers
100%
5K+
Devices delivered
More than 5,000 REVEAL Diamond Detectors and Loupe S units are in jewelers' hands worldwide, verifying 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
Unrivaled know-how and innovative technologies
Through extensive R&D, trademarked technology and deep data accumulation, JTR is at the forefront of semi-automatic and automatic grading. This is how we safeguard the gem and jewelry 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 auto-detection and analysis to anticipate the challenges of tomorrow.
Flagship
REVEAL Diamond Detector 3S
On-device auto-detection: diamond screening, imaging and separation of natural from lab-grown in a single guided pass.
Equipment Division
Explore
Detection
REVEAL Detector
Identify CVD & HPHT lab-grown diamonds anywhere.
REVEAL Diamond Detector 2S
Explore
Everyday essential
LOUPE S
A precision-engineered jeweler's magnifier with crystal-clear optics.
Optics
Explore
More than a laboratory