Question

brief note on kohinoor diamond.

Answer 1

Kohinoor Diamond of India. The Koh-i-Noor is a 106 carats diamond which was once the largest diamond in the world. Previously, it has belonged to various rulers in India; today it lies in the hands of the British royal family and is part of the Crown Jewels.

Answer 2

The Koh-i-Noor  also spelt Kohinoor and Koh-i-Nur, is one of the largest cut diamonds in the world, weighing 105.6 carats (21.12 g), and part of the British Crown Jewels.

Probably mined in Golconda, India, there is no record of its original weight, but the earliest well-attested weight is 186 old carats (191 metric carats or 38.2 g). Koh-i-Noor is Persian for "Mountain of Light"; it has been known by this name since the 18th century. It changed hands between various factions in modern-day India, Pakistan, Iran, and Afghanistan, until being ceded to Queen Victoria after the British conquest of the Punjab in 1849.

Originally, the stone was of a similar cut to other Mughal era diamonds which are now in the Iranian Crown Jewels. In 1851, it went on display at the Great Exhibition in London, but the lacklustre cut failed to impress viewers. Prince Albert, husband of Queen Victoria, ordered it to be re-cut as an oval brilliant by Coster Diamonds. By modern standards, the culet is unusually broad, giving the impression of a black hole when the stone is viewed head-on; it is nevertheless regarded by gemmologists as "full of life".