In India, there are several organizations that offer diamond certification services, including the Gemological Institute of India (GII), International Gemological Institute (IGI), and Indian Diamond Institute (IDI).

The Gemological Institute of India (GII) is a leading gemological laboratory in India, offering diamond certification services to consumers and the diamond industry. The GII is affiliated with the Gemological Institute of America (GIA), and its certification services include grading reports for diamonds based on the 4Cs (cut, color, clarity, and carat weight), as well as identification and origin reports for diamonds and other gemstones.

The International Gemological Institute (IGI) is another leading diamond certification organization with a presence in India. The IGI offers diamond grading reports and identification reports for diamonds and other gemstones, as well as jewelry appraisal services.

The Indian Diamond Institute (IDI) is a government-run diamond grading and training institute in India, offering diamond certification and grading services as well as training programs for the diamond industry.

When purchasing a diamond in India, it’s important to look for a certification from a reputable organization such as the GII, IGI, or IDI, as this can provide assurance that the diamond has been thoroughly evaluated and meets certain quality standards. The certification can also be used to verify the authenticity and value of the diamond in the future, which can be helpful for insurance purposes or if the diamond is ever resold.