Only natural diamond can be called a diamond, says the Indian regulator BIS 

The Bureau of Indian Standards (BIS), the Indian regulator of quality standards, has come out with a new rule on diamonds, clarifying that only natural diamonds can be termed “diamond”. The BIS has adopted IS 19469:2025 and modified ISO 18323:2015.

India’s New Diamond Rule is to protect consumers and bring transparency to every diamond purchase across India. The Indian gem and jewellery industry has long faced challenges due to the use of multiple, inconsistent, and often confusing terms to describe diamonds and their alternatives, particularly across digital and e-commerce platforms. In the absence of a single, formal standard, consumers have often been left uncertain about what they are buying.