Kohinoor diamond: Kohinoor is considered the most precious ... But it was extracted from the mine of Golconda located in Guntur district of Andhra Pradesh about 800 years ago.
The Koh-i-Noor. 105-carats, oval-shaped, and arguably, the world’s most famous diamond. Today, it’s set among 2,800 other stones in the Crown Jewels, but it hasn’t always been there.