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, 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 …
Glass replicas of the diamond before (upside down) and after it was re-cut in 1852
One of Ranjit Singh's favourite horses with the head of his stables. His jewels are shown, to scale, including the Koh-i-Noor (top centre).
Diagram of the pre-1852 cut. Fig I. Shaded area is the base. Fig II. A: flaw; B and C: notches cut to hold stone in a setting; D: flaw created by fracture at E; F: fracture created by a blow; G: unpolished cleavage plane; H: basal cleavage plane. Fig III. Opposite side, showing facets and peak of the "Mountain of Light"