AIM-listed Petra Diamonds has recovered at its Cullinan mine in South Africa a 121.6 ct white diamond. The company said the stone, which has an exceptional color and clarity, will be sold alongside other high-quality stones in 2016’s last call to offer which is actually ongoing in Johannesburg.

The new discovery follows the sale by the company of the last Cullinan Dream on June 9. The stone is one of four blue diamonds cut and polished from a 122.52 ct stone found at Cullinan. The 24.18 ct stone was sold to Christie’s for $25.37 million.

The Cullinan mine is renowned for the major diamond discoveries made there. In 1905, the world’s biggest diamond, a 3,106 ct stone, was discovered at the mine. Since it was bought in 2008 by Petra Diamonds, the company has found other big blue diamonds including the Blue Moon of Josephine, a 12.03 ct stone which was sold for $48.5 million.

Louis-Nino Kansoun