IDT - Diamond Testing & Certificate Company

As one of the top diamond testing companies in the world, we provide diamond grading services and training to our clients across the globe. With our widespread presence in many countries like Dubai, India, Bangkok, Hong Kong and Singapore, we deliver certified results with very high precision.


For aspiring Diamond Grading professionals, established Jewelry Designers or experienced Gemologists or graduates, IDT's worldwide Institutes offer an unrivaled range of courses to provide you the best Gemology training at your location.


Diamonds and gemstones of similar appearance can have a lot of difference in value. Therefore, by utilizing our superior precious stones testing methods, an IDT Certificate clearly elaborates the details of any valuable stone to build a good level of trust between the buyers and the sellers.


Check out the latest IDT branded collection of Microscopes, Loupes, Tweezers, T-shirts etc.