|Archduke Joseph diamond from Golconda, India CBS News|
|Kingdom of Golkonda, India.|
The most distinctive feature of Golconda diamonds is (some experts believed in the past), the presence of less nitrogen or boron or lack of them may make them differ from other diamonds. Yet another feature is they contain less impurity, hence many of them are colorless. Until the end of 19th century, Golconda was a famous diamond center where the industry was involved in important activities related to diamond processing - sizing, cutting, polishing, sorting , marketing, etc., employing 10,000 plus people. The medieval diamond trade here got the attentions of famous French diamond traders and experts such as Jean de Thévenot and François Bernier. According to the Hyderabad (Deccan) based historian, Mohammed Safiullah the estimated output from all mines in Golconda was believed to be around 12 million carats (vide: The New Indian Express of 22 October 2016). India is the only country where the diamonds have a long history and are said to have been known for at least 3,000 years but most likely 6,000 years. They were mostly found in placer / Alluvial deposits.
Among the countless famous diamonds from Kollur mines, the following may be worthy of mention:
The Orloff Diamond, 300 carats (60.0 g). Daryā-ye Nūr, 182 carats (36.4 g); the largest one in the Iranian Crown. The Golconda Diamond, 135 carats (27.0 g); belonging to Dunklings Jewellers, Melbourne, Australia. Koh-i-Noor, 105.6 carats (21.12 g) (793 carats (158.6 g) rough, 186 carats (37.2 g) cut, further cut for Crown Jewels); in the British Crown Jewels, London. The Hope Diamond, 67 carats (13.4 g); in the American Museum of Natural History, the Smithsonian Institution, Washington and Wittelsbach-Graff Diamond, 31.06 carats (6.212 g) cut; currently owned by Hamad bin Khalifa Al Thani, former ruler of Qatar.
|Archduke Joseph. .|