SGI is offering diamond testing services with technological equipment such as AMS2 (Automated Melee Screening) which represents a significant technological advance in the field of diamond melee screening. This latest model of AMS2 accepts a wider range of stone sizes and shapes. SGI only accepts diamonds in loose and unmounted state to provide grading services for natural diamonds.

For further enquiries please contact us.


  • Identification of synthetic diamonds

  • Analysis of diamond melees

  • Identification and quality control of small diamonds

  • Grading for natural diamonds

    • Carat
    • Clarity
    • Colour
    • Cut