K. Girdharlal | There's More to Making Diamonds K. Girdharlal, better known as KG, is India's leading diamond manufacturer and exporter. K. Girdharlal, better known as K.G., was established in 1967 dominantly as diamond traders, with little resources used in diamond cutting and polishing. In the early 1990s, we shifted our focus to cutting and polishing diamonds in Surat, becoming one of India’s leading manufacturers in the industry.