Shah diamond

Shah diamond, yellow-tinged stone of about 89 carats that bears three ancient Persian inscriptions, indicating it was discovered before 1591, probably in the Golconda mines in India. The inscriptions are to Neẓām Shāh Borhān II, 1591; Shāh Jahān, son of Shāh Jahāngīr, 1641; and Fatḥ ʿAlī Shāh, 1826. Given to Tsar Nicholas I by Fatḥ ʿAlī Shāh in 1829, it is displayed in the Diamond Fund of Russia in Moscow.