The Koh-i Nur Diamond

The Kōh-i Nūr Diamond, meaning "Mountain of Light" in Persian language, was once the largest known diamond in the world. It is believed to have originated in the state of Andhra Pradesh in India together with its double, the Darya-ye Noor (meaning the "Sea of Light") and is rumored to have belonged to various rulers who fought bitterly over it during times of war. In 1850, this large diamond was confiscated and became part of the British Crown Jewels when Queen Victoria was proclaimed Empress of India in 1877.

Also take a look at some other Famous Diamonds:

The Hope Diamond
The Cullinan Diamond
The Centenary Diamond
The Regent Diamond
The Orlov Diamond