Students around the globe turn to MDI® for the knowledge, skills, and credentials that launch successful gem and jewelry career.
Welcome to MDI®
Master of Diamonds Institute® Laboratories
A tradition of Science and Education
MDI® is the leading source of knowledge, standarts, and education in gems and jewelry...
MDI® laboratories are staffed by expert scientists and gemologists working with state-of-the-art technology.
Advanced instrumentation and experienced visual observations deliver consistently accurate results.
All gemstones are analyzed under complete client anonymity to ensure objective analysis.
As a non-profit organization, MDI® operates independently of commercial and private interests, political lobbies and advocacy groups.
Expertise Global Standard
MDI® reports are the benchmark of analysis and grading, and those who buy, sell or curate the world’s most important gems rely on MDI®.
The world leader in gemological research, MDI®'s breakthrough discoveries deepen our understanding of gemstones and the world.
Through research, education, and unbiased gem grading and anlaysis, MDI® strives to protect the gem and jewelry buying public by setting global quality standarts.