Ahmad Shah Qajar
picture - Ahmad Shah Qajar, the last emperor of the Qajar rulers, here wearing the "Darya-i Noor" diamond("Sea of Light") on his cap. The world's largest uncut diamond and the "sister" of the "Kooh-e Noor", the world's largest cut diamond, which once belonged to the Iranian Crown Jewels, but now is part of the British Crown Jewels.