Your partner in grading, offering a one-stop solution for consumer confidence.

Founded on internationally accepted standards and equipped with decades of experience. JTR’s diamond and diamond jewellery grading institute blends traditional grading processes with the latest proprietary innovative technologies, ensuring that your diamonds are in safe hands.

We are carrying the diamond and diamond jewellery classification to the future.

Located at the crossroads of Europe and Asia, JTR’s (Jewellery Technology Research) gemmological institute stands on the shoulders of numerous qualified women and men who have graded millions of diamonds on its premises during the past decade and a half.

With its establishment, JTR is taking diamond and diamond jewellery grading into the future. Its laboratory is equipped with the latest gemmological instruments, tools, and technology. JTR’s graders follow the diamond industry and trade’s internationally accepted grading standards and practices.