His collection of diamonds was extraordinary and included some of the world's most famous stones such as the Darya-e Nur, Nur-Ul-Ain Diamond, Koh-i-Noor, Hope Diamond, Princie Diamond, Regent Diamond, and Wittelsbach Diamond.
Nizam Osman Ali of Hyderabad was the owner of immense wealth and according to reports, over Rs 3 billion of Nizam Ali are still deposited at a bank in England.