A group of glass replicas of historic diamonds including the Koh-i-noor in its former and current state
Europe, first half of the 20th Century
comprising fourteen glass diamonds, one blue, in fitted case, each with printed label, the box with retailers label to front for 'Jos. H. Lehmann, Jeweler, Portland, Ore.'
the case 28 x 18.3 x 4.3 cm.
Footnotes:
The replicas include the Grand-Mogul, Orloff, Regent, Grand Duke of Tuscany, Star of the South, Koh-i-noor (old cut), Koh-i-noor (new cut), Shah, Piggot, Nassack, Sancy, Pasha of Egypt, Blue and the Polar Star.

Replica gem sets of this kind were created for diamond promotion purposes and for gemmological education. The present set contains a replica of the famous Koh-i-noor (Mountain of Light) diamond. The stone is known to have been in the possession of Mughal emperors, including Shah Jahan, where it was set into his Peacock Throne. The name was given to the stone by the Persian ruler Nadir Shah after he captured Delhi in 1739 and it soon came to symbolise supreme power in the region. The Koh-i-noor later became the possession of Queen Victoria following the Treaty of Lahore, after which time it was re-cut by Prince Albert, resulting in the loss of 40% of the stone's weight. Both the original and the re-cut versions of the diamond are replicated in this set. For further discussion on the stone, see D. Toor, In Pursuit of Empire: Treasures from the Toor Collection of Sikh Art, London, 2018.

For a similar replica gem set sold in these rooms, see Bonhams Islamic and Indian Art, 25 October 2021, lot 336.