"We are restarting sales in May," Sergei Vybornov said.
Vybornov said Alrosa had already signed contracts with five companies on diamond sales worth some $300 million by the end of the year.
Alrosa accounts for 97% of Russian and 25% of global diamond output. The Russian government holds a 50.9% stake in the company.
Vybornov also noted that market prices for diamonds were currently around the mid-2007 level.